Documentation of Akhil PC Model

View the 73 variables sorted by type, module, group, module/group/name, view, Level Structure, or in a view summary.

Model Assessment Results
Model Information Number
Total Number of Variables
73
Total Number of State Variables (Level+Smooth+Delay Variables)
10 (13.7%)
Total Number of Stocks (Stocks in Level+Smooth+Delay Variables) †
10 (13.7%)
0
0
17 (23.3%)
62 (84.9%)
0
0
Time Unit
Week
Initial Time
0
Final Time
1000
Reported Time Interval
TIME STEP
Time Step
0.03125
Model Is Fully Formulated
Yes
Modeler-Defined Groups
- No -
VPM File Available
- No -


Warnings Number
0
Equations with Embedded Data (0 and 1 constants ignored)
4 (5.5%)
Unavailable
0
0
0
0
0
1 (1.4%)
7 (9.6%)
0

Potential Omissions Number
0
1
0
5
0

Types:
L : Level (10 / 10) * SM : Smooth (0 / 0) * DE : Delay (0 / 0) * † LI : Level Initial (4) I : Initial (0)
C : Constant (23) F : Flow (11) A : Auxiliary (40) Sub: Subscripts (0) D : Data (0)
G : Game (0) T : Lookup (0 / 0) ††      
* (state variables / total stocks)
† Total stocks do not include fixed delay variables.
†† (lookup variables / lookup tables).
 
Groups:
Akhil PC Model (69)
(Default) 		Control (4)
Simulation Control Parameters
Modules:
Default (73)
Views:
Work flows (54)Resources (48) 
Search: •••    a-b    c-d    e-f    g-h    i-j    k-l    m-n    o-p    q-r    s-t    u-v    w-x    y-z    •••   

Module
Group
Type
 Variable Name and Description
Default Akhil PC Model
(Default)		 #1
L
Actual Capability Staff (person)
= ∫Adjust Capability Staff dt + [Initial Capability Staff]
Description: The capability development staff that is currently in place on the project.
Present in 1 view: Used by:
  • Adjust Capability Staff - Adjusts the capability staff on the project. The adjustment is assumed to occur over the staff delay time.
  • Capability Resource Rate - Capability resource rate captures the total effort put in by the project team towards capability development. It is the product of the total number of staff working towards capability development, the work effort (in hours or weeks) and the productivity of the imporvement effort.
Default Akhil PC Model
(Default)		 #2
L
Actual Design Staff (person)
= ∫Adjust design staff dt + [Project staff]
Description: The design staff that is currently in place on the project. The initial condition indicates that at the beginning of the entire project staff is assigned to design.
Present in 1 view: Used by:
  • Design resources rate - The rate at which packages can be designed when contrained by resources. It increases with increases in design staff and staff productivity.
  • Design staff gap - The difference between the desired design staff and the actual design staff. The actual design staff approaches the desired level over through the 1st order delay. If the desired design staff is less then the actual design staff the gap is negative and the actual design staff decreases after a delay.
Default Akhil PC Model
(Default)		 #3
L
Actual Quality Assurance Staff (person)
= ∫Adjust quality assurance staff dt + [0]
Description: The quality assurance staff that is currently in place on the project.
Present in 1 view: Used by:
  • Quality Assurance resources rate - The rate at which packages can be checked for errors when contrained by resources. It increases with increases in quality assurance staff and staff productivity.
  • Quality Assurance staff gap - The difference between the desired quality assurance staff and the actual quality assurance staff. The actual quality assurance staff approaches the desired level over through the 1st order delay. If the desired quality assurance staff is less then the actual quality assurance staff the gap is negative and the actual quality assurance staff decreases after a delay.
Default Akhil PC Model
(Default)		 #4
L
Actual Rework Staff (person)
= ∫Adjust rework staff dt + [0]
Description: The rework staff that is currently in place on the project.
Present in 1 view: Used by:
  • Rework resources rate - The rate at which packages can be reworked when contrained by resources. It increases with increases in rework staff and staff productivity.
  • Rework staff gap - The difference between the desired rework staff and the actual rework staff. The actual rework staff approaches the desired level over through the 1st order delay. If the desired rework staff is less then the actual rework staff the gap is negative and the actual rework staff decreases after a delay.
Default Akhil PC Model
(Default)		 #5
F,A

add to duration (Week/Week)
= IF THEN ELSE(Work Released<Scope fraction required to be considered completed*Project scope, 1 , 0 )
Description: Adds to the project duration if the amount of work released is less then the work required to be completed before the project can be considered complete.
Present in 1 view: Used by:
  • Project Duration - The weeks required to complete the project based upon the percent of work required for the project to be considered complete and the amount of work completed to date.
Default Akhil PC Model
(Default)		 #6
F,A

Adjust Capability Staff (person/Week)
= ((Desired Capability Staff-Actual Capability Staff)/Staff adjustment delay)
Description: Adjusts the capability staff on the project. The adjustment is assumed to occur over the staff delay time.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #7
F,A

Adjust design staff (person/Week)
= (Design staff gap/Staff adjustment delay)
Description: Adjusts the design staff on the project. The adjustment is assumed to occur over the staff delay time. If the design staff gap is negative the actual design staff is reduced.
Present in 1 view: Used by:
  • Actual Design Staff - The design staff that is currently in place on the project. The initial condition indicates that at the beginning of the entire project staff is assigned to design.
Default Akhil PC Model
(Default)		 #8
F,A

Adjust quality assurance staff (person/Week)
= Quality Assurance staff gap/Staff adjustment delay
Description: Adjusts the quality assurance staff on the project. The adjustment is assumed to occur over the staff delay time. If the quality assurance staff gap is negative the actual quality assurance staff is reduced.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #9
F,A

Adjust rework staff (person/Week)
= (Rework staff gap/Staff adjustment delay)
Description: Adjusts the rework staff on the project. The adjustment is assumed to occur over the staff delay time. If the rework staff gap is negative the actual rework staff is reduced.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #10
F,A

approve packages (work packages/Week)
= Quality Assurance rate-discover rework rate
Description: The rate at which work packages are approved and released. It is the difference between the quality assurance rate and the rate at which work packages are discovered to require rework.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #11
A
Available Project Staff (person)
= Project staff*Reference Fraction of Effort to Output
Description: The number of people available for production activities (Design, QA & rework)
Present in 1 view: Used by:
  • Desired design staff - The desired number of persons to be assigned to the design staff based upon the proportion of design work to the project backlog.
  • Desired quality assurance staff - The desired number of persons to be assigned to the quality assurance staff based upon the proportion of quality assurance work to the project backlog.
  • Desired rework staff - The desired number of persons to be assigned to the rework staff based upon the proportion of rework backlog to the project backlog.
Default Akhil PC Model
(Default)		 #12
A
Average Capability Loss Rate (1/Week)
= 1/104
Description: The fractional rate at which capabilities erode as personnel turn over and as environmental, technological, competitive and other conditions change.The value of 0.5/year in the original model was changed to 1/104 percent per week in the project model.
Present in 2 views: Used by:
  • Capability Decrease - Capabilities erode over time after a certain delay, with a mean Lag given by the reciprocal of the fractional capability erosion rate. Capability erosion is modeled as an Erlang lag. The user can specify the order of the delay.
  • Improvement Staff Productivity - The productivity of improvement effort is the increase in capabilities per week of improvement effort. It is set so that the simulations begin in equilibrium along the lines of capability trap architypical model. It is also defined as a constant to be consistent with the architypical project model which assumes productivity to be constant.
Default Akhil PC Model
(Default)		 #13
L
Capabilities (Dmnl)
= ∫Capability Increase-Capability Decrease dt + [Initial Capabilities]
Description: The capabilities of the project team are a stock, increased by improvement effort and investment in capability development,and decreased as capabilities erode.
Present in 2 views: Used by:
  • Capability Decrease - Capabilities erode over time after a certain delay, with a mean Lag given by the reciprocal of the fractional capability erosion rate. Capability erosion is modeled as an Erlang lag. The user can specify the order of the delay.
  • Capability deficit fraction - The deficit of capabilities relative to the normal amount of capabilities, as a fraction. Values >1 reflect "surplus" capabilities. (0, max capabilities=10)
  • Capability Increase - Capabilities increase as the result of effort applied to improvement effort and capability development. Improvement is determined by the product of the labor force, the average time per person per week spent on improvement and the productivity of improvement effort. Improvement slows, however, as capabilities approach their maximum value.Capabilities can increase with education and training.
Default Akhil PC Model
(Default)		 #14
F,A

Capability Decrease (1/Week)
Capability Decrease = A FUNCTION OF( Average Capability Loss Rate,Capabilities)
Capability Decrease = Capabilities*Average Capability Loss Rate
Description: Capabilities erode over time after a certain delay, with a mean Lag given by the reciprocal of the fractional capability erosion rate. Capability erosion is modeled as an Erlang lag. The user can specify the order of the delay.
Present in 1 view: Used by:
  • Capabilities - The capabilities of the project team are a stock, increased by improvement effort and investment in capability development,and decreased as capabilities erode.
Default Akhil PC Model
(Default)		 #15
A
Capability deficit fraction (Dmnl)
= (Initial Capabilities-Capabilities)/Initial Capabilities
Description: The deficit of capabilities relative to the normal amount of capabilities, as a fraction. Values >1 reflect "surplus" capabilities. (0, max capabilities=10)
Present in 1 view: Used by:
  • Fraction of work packages discovered to require rework - The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
  • Min design duration - The minimum number of weeks a work packages must stay in the design backlog until it can be constructed.Accounting for deployment of new technology/best practices.
  • Min quality assurance duration - The minimum number of weeks a work packages must stay in the quality assurance backlog until it can be checked for errors- accounts for implementing best practices ,new checks, etc.
  • min rework duration - The minimum number of weeks a work packages must stay in the rework backlog until it can be reworked.
Default Akhil PC Model
(Default)		 #16
F,A

Capability Increase (1/Week)
= Capability Resource Rate*(Maximum Capabilities-Capabilities)/Maximum Capabilities
Description: Capabilities increase as the result of effort applied to improvement effort and capability development. Improvement is determined by the product of the labor force, the average time per person per week spent on improvement and the productivity of improvement effort. Improvement slows, however, as capabilities approach their maximum value.Capabilities can increase with education and training.
Present in 1 view: Used by:
  • Capabilities - The capabilities of the project team are a stock, increased by improvement effort and investment in capability development,and decreased as capabilities erode.
Default Akhil PC Model
(Default)		 #17
A
Capability Resource Rate (1/Week)
= Actual Capability Staff*Improvement Staff Productivity*Capability Staff Effort Rate
Description: Capability resource rate captures the total effort put in by the project team towards capability development. It is the product of the total number of staff working towards capability development, the work effort (in hours or weeks) and the productivity of the imporvement effort.
Present in 2 views: Used by:
  • Capability Increase - Capabilities increase as the result of effort applied to improvement effort and capability development. Improvement is determined by the product of the labor force, the average time per person per week spent on improvement and the productivity of improvement effort. Improvement slows, however, as capabilities approach their maximum value.Capabilities can increase with education and training.
Default Akhil PC Model
(Default)		 #18
C
Capability Staff Effort Rate (Week/Week)
= 1
Description: The time spent on capability development and improvement. The amount of work put in by capability staff per week. (1 workweek is equivalent to 40 hours of work/ week,i.e., 40 hours/week = 1 week/week)
Present in 1 view: Used by:
  • Capability Resource Rate - Capability resource rate captures the total effort put in by the project team towards capability development. It is the product of the total number of staff working towards capability development, the work effort (in hours or weeks) and the productivity of the imporvement effort.
Default Akhil PC Model
(Default)		 #19
L
"Design Backlog & WIP" (work packages)
= ∫-design packages dt + [Project scope]
Description: The number of work packages waiting to be constructed.
Present in 2 views: Used by:
  • design process rate - The number of work packages that can be designed if the process constrains the rate. It assumes that work is available after it has remained in the design backlog for the minimum duration.
  • Fraction of project backlog in design - The percentage of work packages that are contained within the design backlog. It increases as the design backlog increases and decreases as the project backlog increases.
  • project backlog - The project backlog represents the work packages remaining to be completed on the project. It is the sum of the Design, QA, and RW backlogs.
Default Akhil PC Model
(Default)		 #20
F,A

design packages (work packages/Week)
= MIN(design process rate,Design resources rate)
Description: The rate at which work packages are constructed can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are constructed.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #21
A
design process rate (work packages/Week)
= "Design Backlog & WIP"/Min design duration
Description: The number of work packages that can be designed if the process constrains the rate. It assumes that work is available after it has remained in the design backlog for the minimum duration.
Present in 1 view: Used by:
  • design packages - The rate at which work packages are constructed can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are constructed.
Default Akhil PC Model
(Default)		 #22
A
Design resources rate (work packages/Week)
= ((0*Desired design staff*Production Staff Productivity)+(1*Actual Design Staff*Production Staff Productivity))*Production Staff effort rate
Description: The rate at which packages can be designed when contrained by resources. It increases with increases in design staff and staff productivity.
Present in 2 views: Used by:
  • design packages - The rate at which work packages are constructed can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are constructed.
Default Akhil PC Model
(Default)		 #23
A
Design staff gap (person)
= Desired design staff-Actual Design Staff
Description: The difference between the desired design staff and the actual design staff. The actual design staff approaches the desired level over through the 1st order delay. If the desired design staff is less then the actual design staff the gap is negative and the actual design staff decreases after a delay.
Present in 1 view: Used by:
  • Adjust design staff - Adjusts the design staff on the project. The adjustment is assumed to occur over the staff delay time. If the design staff gap is negative the actual design staff is reduced.
Default Akhil PC Model
(Default)		 #24
A
Desired Capability Staff (person)
= Project staff*(1-Reference Fraction of Effort to Output)
Description: The desired number of persons to be assigned to the capability development staff based upon the reference fraction of effort to output. The smaller the fraction, more project staff are assigned to the capability development team and vice versa.
Present in 1 view: Used by:
  • Adjust Capability Staff - Adjusts the capability staff on the project. The adjustment is assumed to occur over the staff delay time.
Default Akhil PC Model
(Default)		 #25
A
Desired design staff (person)
= Fraction of project backlog in design*Available Project Staff
Description: The desired number of persons to be assigned to the design staff based upon the proportion of design work to the project backlog.
Present in 1 view: Used by:
  • Design resources rate - The rate at which packages can be designed when contrained by resources. It increases with increases in design staff and staff productivity.
  • Design staff gap - The difference between the desired design staff and the actual design staff. The actual design staff approaches the desired level over through the 1st order delay. If the desired design staff is less then the actual design staff the gap is negative and the actual design staff decreases after a delay.
Default Akhil PC Model
(Default)		 #26
A
Desired quality assurance staff (person)
= Fraction of project backlog in quality assurance*Available Project Staff
Description: The desired number of persons to be assigned to the quality assurance staff based upon the proportion of quality assurance work to the project backlog.
Present in 1 view: Used by:
  • Quality Assurance resources rate - The rate at which packages can be checked for errors when contrained by resources. It increases with increases in quality assurance staff and staff productivity.
  • Quality Assurance staff gap - The difference between the desired quality assurance staff and the actual quality assurance staff. The actual quality assurance staff approaches the desired level over through the 1st order delay. If the desired quality assurance staff is less then the actual quality assurance staff the gap is negative and the actual quality assurance staff decreases after a delay.
Default Akhil PC Model
(Default)		 #27
A
Desired rework staff (person)
= Fraction of project backlog in rework*Available Project Staff
Description: The desired number of persons to be assigned to the rework staff based upon the proportion of rework backlog to the project backlog.
Present in 1 view: Used by:
  • Rework resources rate - The rate at which packages can be reworked when contrained by resources. It increases with increases in rework staff and staff productivity.
  • Rework staff gap - The difference between the desired rework staff and the actual rework staff. The actual rework staff approaches the desired level over through the 1st order delay. If the desired rework staff is less then the actual rework staff the gap is negative and the actual rework staff decreases after a delay.
Default Akhil PC Model
(Default)		 #28
F,A

discover rework rate (work packages/Week)
= Fraction of work packages discovered to require rework*Quality Assurance rate
Description: The rate at which work packages are discovered to require rework. The rate increases with both the quality assurance rate and the percentage of tasks that require rework.
Present in 1 view: Used by:
  • approve packages - The rate at which work packages are approved and released. It is the difference between the quality assurance rate and the rate at which work packages are discovered to require rework.
  • "Quality Assurance Backlog & WIP" - The number of work packages waiting to be checked for quality assurance.
  • "Rework Backlog & WIP" - The number of work packages that are waiting to be reworked.
Default Control #29
C
FINAL TIME (Week)
= 1000
Description: The final time for the simulation.
Not Present In Any View
Default Akhil PC Model
(Default)		 #30
C
"Fraction discovered to need rework - reference" (Dmnl)
= 0.2
Description: The fraction of work discovered to require rework that occurs regardless of the capabilities of the staff, i.e. the rework fraction if the staff has the reference (target) capabilities.
Present in 1 view: Used by:
  • Fraction of work packages discovered to require rework - The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
Default Akhil PC Model
(Default)		 #31
A
Fraction of project backlog in design (Dmnl)
= "Design Backlog & WIP"/project backlog
Description: The percentage of work packages that are contained within the design backlog. It increases as the design backlog increases and decreases as the project backlog increases.
Present in 1 view: Used by:
  • Desired design staff - The desired number of persons to be assigned to the design staff based upon the proportion of design work to the project backlog.
Default Akhil PC Model
(Default)		 #32
A
Fraction of project backlog in quality assurance (Dmnl)
= "Quality Assurance Backlog & WIP"/project backlog
Description: The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
Present in 1 view: Used by:
  • Desired quality assurance staff - The desired number of persons to be assigned to the quality assurance staff based upon the proportion of quality assurance work to the project backlog.
Default Akhil PC Model
(Default)		 #33
A
Fraction of project backlog in rework (Dmnl)
= "Rework Backlog & WIP"/project backlog
Description: The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
Present in 1 view: Used by:
  • Desired rework staff - The desired number of persons to be assigned to the rework staff based upon the proportion of rework backlog to the project backlog.
Default Akhil PC Model
(Default)		 #34
A
Fraction of work packages discovered to require rework (Dmnl [0,1])
= MAX(Min fraction discovered to require rework,MIN(Max fraction discovered to require rework,"Fraction discovered to need rework - reference"*(1+Capability deficit fraction*Sensitivity of rework fraction to capabilities)))
Description: The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
Present in 1 view: Used by:
  • discover rework rate - The rate at which work packages are discovered to require rework. The rate increases with both the quality assurance rate and the percentage of tasks that require rework.
Default Akhil PC Model
(Default)		 #35
A
Improvement Staff Productivity (1/person/Week)
= Initial Capabilities*Average Capability Loss Rate/Initial Capability Staff
Description: The productivity of improvement effort is the increase in capabilities per week of improvement effort. It is set so that the simulations begin in equilibrium along the lines of capability trap architypical model. It is also defined as a constant to be consistent with the architypical project model which assumes productivity to be constant.
Present in 1 view: Used by:
  • Capability Resource Rate - Capability resource rate captures the total effort put in by the project team towards capability development. It is the product of the total number of staff working towards capability development, the work effort (in hours or weeks) and the productivity of the imporvement effort.
Default Akhil PC Model
(Default)		 #36
LI,C
Initial Capabilities (Dmnl)
= 1
Description: The starting and target number of capabilities needed to perform the work at reference rework fraction.
Present in 2 views: Used by:
  • Capabilities - The capabilities of the project team are a stock, increased by improvement effort and investment in capability development,and decreased as capabilities erode.
  • Capability deficit fraction - The deficit of capabilities relative to the normal amount of capabilities, as a fraction. Values >1 reflect "surplus" capabilities. (0, max capabilities=10)
  • Improvement Staff Productivity - The productivity of improvement effort is the increase in capabilities per week of improvement effort. It is set so that the simulations begin in equilibrium along the lines of capability trap architypical model. It is also defined as a constant to be consistent with the architypical project model which assumes productivity to be constant.
Default Akhil PC Model
(Default)		 #37
LI,C
Initial Capability Staff (person)
= 1
Description: The size of the initial capability staff at t=0.
Present in 1 view: Used by:
  • Actual Capability Staff - The capability development staff that is currently in place on the project.
  • Improvement Staff Productivity - The productivity of improvement effort is the increase in capabilities per week of improvement effort. It is set so that the simulations begin in equilibrium along the lines of capability trap architypical model. It is also defined as a constant to be consistent with the architypical project model which assumes productivity to be constant.
Default Control #38
C
INITIAL TIME (Week)
= 0
Description: The initial time for the simulation.
Not Present In Any View
Used by:
  • Time - Internally defined simulation time.
Default Akhil PC Model
(Default)		 #39
C
Max fraction discovered to require rework (Dmnl)
= 1
Description: The maximum fraction of rework that can be generated and discovered. Assumes the staff does some things right even when capabilities are never developed and are at a minimum.
Present in 1 view: Used by:
  • Fraction of work packages discovered to require rework - The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
Default Akhil PC Model
(Default)		 #40
C
Maximum Capabilities (Dmnl)
= 10
Description: The maximum level of capabilities, determined by the project manager.
Present in 2 views: Used by:
  • Capability Increase - Capabilities increase as the result of effort applied to improvement effort and capability development. Improvement is determined by the product of the labor force, the average time per person per week spent on improvement and the productivity of improvement effort. Improvement slows, however, as capabilities approach their maximum value.Capabilities can increase with education and training.
Default Akhil PC Model
(Default)		 #41
A
Min design duration (Week [0,2])
= Reference min design duration*(1+(MAX(-0.9, (Capability deficit fraction*Sensitivity of Min design duration to Capability Defecit))))
Description: The minimum number of weeks a work packages must stay in the design backlog until it can be constructed.Accounting for deployment of new technology/best practices.
Present in 1 view: Used by:
  • design process rate - The number of work packages that can be designed if the process constrains the rate. It assumes that work is available after it has remained in the design backlog for the minimum duration.
Default Akhil PC Model
(Default)		 #42
C
Min fraction discovered to require rework (Dmnl)
= 0
Description: The minimum fraction of rework that can be generated and discovered.
Present in 1 view: Used by:
  • Fraction of work packages discovered to require rework - The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
Default Akhil PC Model
(Default)		 #43
A
Min quality assurance duration (Week [0,2])
= Reference min QA duration*(1+(MAX(-0.9, (Capability deficit fraction*Sensitivity of Min quality assurance duration to Capability Defecit))))
Description: The minimum number of weeks a work packages must stay in the quality assurance backlog until it can be checked for errors- accounts for implementing best practices ,new checks, etc.
Present in 1 view: Used by:
  • Quality Assurance process rate - The the number of work packages that can be checked for errors if the process constrains the rate. It assumes that work is available after it has remained in the quality assurance backlog for the minimum duration.
Default Akhil PC Model
(Default)		 #44
A
min rework duration (Week [0,2])
= Reference min rework duration*(1+(MAX(-0.9, (Capability deficit fraction*Sensitivity of min rework duration to capability deficity))))
Description: The minimum number of weeks a work packages must stay in the rework backlog until it can be reworked.
Present in 1 view: Used by:
  • rework process rate - The the number of work packages that can be reworked if the process constrains the rate. It assumes that work is available after it has remained in the rework backlog for the minimum duration.
Default Akhil PC Model
(Default)		 #45
C
Production Staff effort rate (Week/Week)
= 1
Description: The time spent on production activities (Design, QA & Rework). The amount of work put in by production staff per week. (1 workweek is equivalent to 40 hours of work/ week,i.e., 40 hours/week = 1 week/week)
Present in 1 view: Used by:
  • Design resources rate - The rate at which packages can be designed when contrained by resources. It increases with increases in design staff and staff productivity.
  • Quality Assurance resources rate - The rate at which packages can be checked for errors when contrained by resources. It increases with increases in quality assurance staff and staff productivity.
  • Rework resources rate - The rate at which packages can be reworked when contrained by resources. It increases with increases in rework staff and staff productivity.
Default Akhil PC Model
(Default)		 #46
C
Production Staff Productivity (work packages/(person*Week) [0,?])
= 1
Description: The number of work packages that a person can complete in a week. The current formulation assumes that staff productivity is constant through the project and across activities.
Present in 1 view: Used by:
  • Design resources rate - The rate at which packages can be designed when contrained by resources. It increases with increases in design staff and staff productivity.
  • Quality Assurance resources rate - The rate at which packages can be checked for errors when contrained by resources. It increases with increases in quality assurance staff and staff productivity.
  • Rework resources rate - The rate at which packages can be reworked when contrained by resources. It increases with increases in rework staff and staff productivity.
Default Akhil PC Model
(Default)		 #47
A
project backlog (work packages)
= "Design Backlog & WIP"+"Quality Assurance Backlog & WIP"+"Rework Backlog & WIP"
Description: The project backlog represents the work packages remaining to be completed on the project. It is the sum of the Design, QA, and RW backlogs.
Present in 1 view: Used by:
  • Fraction of project backlog in design - The percentage of work packages that are contained within the design backlog. It increases as the design backlog increases and decreases as the project backlog increases.
  • Fraction of project backlog in quality assurance - The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
  • Fraction of project backlog in rework - The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
Default Akhil PC Model
(Default)		 #48
L
Project Duration (Week)
= ∫add to duration dt + [0]
Description: The weeks required to complete the project based upon the percent of work required for the project to be considered complete and the amount of work completed to date.
Present in 1 view: Used by:
  • This is a supplementary variable.
Default Akhil PC Model
(Default)		 #49
LI,C
Project scope (work packages [0,1000])
= 500
Description: The number of work packages that must be completed and approved to complete the project. Each work packages represents a small piece of the project. NOTE the base case value is 500 work packages.
Present in 1 view: Used by:
  • add to duration - Adds to the project duration if the amount of work released is less then the work required to be completed before the project can be considered complete.
  • "Design Backlog & WIP" - The number of work packages waiting to be constructed.
Default Akhil PC Model
(Default)		 #50
LI,C
Project staff (person [0,50])
= 20
Description: The number of people assigned to the project.
Present in 1 view: Used by:
  • Actual Design Staff - The design staff that is currently in place on the project. The initial condition indicates that at the beginning of the entire project staff is assigned to design.
  • Available Project Staff - The number of people available for production activities (Design, QA & rework)
  • Desired Capability Staff - The desired number of persons to be assigned to the capability development staff based upon the reference fraction of effort to output. The smaller the fraction, more project staff are assigned to the capability development team and vice versa.
Default Akhil PC Model
(Default)		 #51
L
"Quality Assurance Backlog & WIP" (work packages)
= ∫design packages+rework rate-approve packages-discover rework rate dt + [0]
Description: The number of work packages waiting to be checked for quality assurance.
Present in 2 views: Used by:
  • Fraction of project backlog in quality assurance - The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
  • project backlog - The project backlog represents the work packages remaining to be completed on the project. It is the sum of the Design, QA, and RW backlogs.
  • Quality Assurance process rate - The the number of work packages that can be checked for errors if the process constrains the rate. It assumes that work is available after it has remained in the quality assurance backlog for the minimum duration.
Default Akhil PC Model
(Default)		 #52
A
Quality Assurance process rate (work packages/Week)
= "Quality Assurance Backlog & WIP"/Min quality assurance duration
Description: The the number of work packages that can be checked for errors if the process constrains the rate. It assumes that work is available after it has remained in the quality assurance backlog for the minimum duration.
Present in 1 view: Used by:
  • Quality Assurance rate - The rate at which work packages are checked for errors can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are checked for errors.
Default Akhil PC Model
(Default)		 #53
A
Quality Assurance rate (work packages/Week)
= MIN(Quality Assurance process rate,Quality Assurance resources rate)
Description: The rate at which work packages are checked for errors can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are checked for errors.
Present in 1 view: Used by:
  • approve packages - The rate at which work packages are approved and released. It is the difference between the quality assurance rate and the rate at which work packages are discovered to require rework.
  • discover rework rate - The rate at which work packages are discovered to require rework. The rate increases with both the quality assurance rate and the percentage of tasks that require rework.
Default Akhil PC Model
(Default)		 #54
A
Quality Assurance resources rate (work packages/Week)
= ((0*Desired quality assurance staff*Production Staff Productivity)+(1*Actual Quality Assurance Staff*Production Staff Productivity))*Production Staff effort rate
Description: The rate at which packages can be checked for errors when contrained by resources. It increases with increases in quality assurance staff and staff productivity.
Present in 2 views: Used by:
  • Quality Assurance rate - The rate at which work packages are checked for errors can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are checked for errors.
Default Akhil PC Model
(Default)		 #55
A
Quality Assurance staff gap (person)
= Desired quality assurance staff-Actual Quality Assurance Staff
Description: The difference between the desired quality assurance staff and the actual quality assurance staff. The actual quality assurance staff approaches the desired level over through the 1st order delay. If the desired quality assurance staff is less then the actual quality assurance staff the gap is negative and the actual quality assurance staff decreases after a delay.
Present in 1 view: Used by:
  • Adjust quality assurance staff - Adjusts the quality assurance staff on the project. The adjustment is assumed to occur over the staff delay time. If the quality assurance staff gap is negative the actual quality assurance staff is reduced.
Default Akhil PC Model
(Default)		 #56
C
Reference Fraction of Effort to Output (Dmnl [0,1])
= 0.944445
Description: The initial fraction of the workforce devoted to production activities. The remainder is devoted to improvement and investment in capabilities. Base Case = 0.944445 (about 1 worker to capability development)
Present in 2 views: Used by:
  • Available Project Staff - The number of people available for production activities (Design, QA & rework)
  • Desired Capability Staff - The desired number of persons to be assigned to the capability development staff based upon the reference fraction of effort to output. The smaller the fraction, more project staff are assigned to the capability development team and vice versa.
Default Akhil PC Model
(Default)		 #57
C
Reference min design duration (Week)
= 10
Description: The minimum number of weeks a work packages must stay in the design backlog until it can be constructed - reference.
Present in 1 view: Used by:
  • Min design duration - The minimum number of weeks a work packages must stay in the design backlog until it can be constructed.Accounting for deployment of new technology/best practices.
Default Akhil PC Model
(Default)		 #58
C
Reference min QA duration (Week)
= 10
Description: The minimum number of weeks a work packages must stay in the quality assurance backlog until it can be checked for errors.
Present in 1 view: Used by:
  • Min quality assurance duration - The minimum number of weeks a work packages must stay in the quality assurance backlog until it can be checked for errors- accounts for implementing best practices ,new checks, etc.
Default Akhil PC Model
(Default)		 #59
C
Reference min rework duration (Week)
= 10
Description: The minimum number of weeks a work packages must stay in the rework backlog until it can be reworked.
Present in 1 view: Used by:
  • min rework duration - The minimum number of weeks a work packages must stay in the rework backlog until it can be reworked.
Default Akhil PC Model
(Default)		 #60
L
"Rework Backlog & WIP" (work packages)
= ∫discover rework rate-rework rate dt + [0]
Description: The number of work packages that are waiting to be reworked.
Present in 2 views: Used by:
  • Fraction of project backlog in rework - The percentage of work packages that are contained within the quality assurance backlog. It increases as the quality assurance backlog increases and decreases as the project backlog increases.
  • project backlog - The project backlog represents the work packages remaining to be completed on the project. It is the sum of the Design, QA, and RW backlogs.
  • rework process rate - The the number of work packages that can be reworked if the process constrains the rate. It assumes that work is available after it has remained in the rework backlog for the minimum duration.
Default Akhil PC Model
(Default)		 #61
A
rework process rate (work packages/Week)
= "Rework Backlog & WIP"/min rework duration
Description: The the number of work packages that can be reworked if the process constrains the rate. It assumes that work is available after it has remained in the rework backlog for the minimum duration.
Present in 1 view: Used by:
  • rework rate - The rate at which work packages are reworked can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are reworked.
Default Akhil PC Model
(Default)		 #62
F,A

rework rate (work packages/Week)
= MIN(rework process rate,Rework resources rate)
Description: The rate at which work packages are reworked can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are reworked.
Present in 1 view: Used by:
Default Akhil PC Model
(Default)		 #63
A
Rework resources rate (work packages/Week)
= ((0*Desired rework staff*Production Staff Productivity)+(1*Actual Rework Staff*Production Staff Productivity))*Production Staff effort rate
Description: The rate at which packages can be reworked when contrained by resources. It increases with increases in rework staff and staff productivity.
Present in 2 views: Used by:
  • rework rate - The rate at which work packages are reworked can be constrained by either available resources or available work packages. The minimum rate between available work and available resources determines the rate at which packages are reworked.
Default Akhil PC Model
(Default)		 #64
A
Rework staff gap (person)
= Desired rework staff-Actual Rework Staff
Description: The difference between the desired rework staff and the actual rework staff. The actual rework staff approaches the desired level over through the 1st order delay. If the desired rework staff is less then the actual rework staff the gap is negative and the actual rework staff decreases after a delay.
Present in 1 view: Used by:
  • Adjust rework staff - Adjusts the rework staff on the project. The adjustment is assumed to occur over the staff delay time. If the rework staff gap is negative the actual rework staff is reduced.
Default Control #65
A
SAVEPER (Week [0,?])
= TIME STEP
Description: The frequency with which output is stored.
Not Present In Any View
Default Akhil PC Model
(Default)		 #66
C
Scope fraction required to be considered completed (Dmnl [0,1])
= 0.995
Description: The percentage of initial scope that must be complete for the project to be considered complete.
Present in 1 view: Used by:
  • add to duration - Adds to the project duration if the amount of work released is less then the work required to be completed before the project can be considered complete.
Default Akhil PC Model
(Default)		 #67
C
Sensitivity of Min design duration to Capability Defecit (Dmnl)
= 1
Description: The amount of influence that defectit/ surplus of capabilities have on the minimum design duration
Present in 1 view: Used by:
  • Min design duration - The minimum number of weeks a work packages must stay in the design backlog until it can be constructed.Accounting for deployment of new technology/best practices.
Default Akhil PC Model
(Default)		 #68
C
Sensitivity of Min quality assurance duration to Capability Defecit (Dmnl)
= 1
Description: The amount of influence that lack/surplus of capabilities have on the minimum QA duration
Present in 1 view: Used by:
  • Min quality assurance duration - The minimum number of weeks a work packages must stay in the quality assurance backlog until it can be checked for errors- accounts for implementing best practices ,new checks, etc.
Default Akhil PC Model
(Default)		 #69
C
Sensitivity of min rework duration to capability deficity (Dmnl)
= 1
Description: The amount of influence that suprlus/ deficit of capabilities have on the minimum rework duration
Present in 1 view: Used by:
  • min rework duration - The minimum number of weeks a work packages must stay in the rework backlog until it can be reworked.
Default Akhil PC Model
(Default)		 #70
C
Sensitivity of rework fraction to capabilities (Dmnl)
= 5
Description: The amount of influence that capabilities have on the rework fraction, reflected in the number of percent that the rework fraction increases for each unit capability deficit.
Present in 1 view: Used by:
  • Fraction of work packages discovered to require rework - The percentage of work packages that are discovered to require rework increases from the reference value generated due to complexity, etc. based on the size of the capabilities gap and is limited to 1.00, when all work is flawed.
Default Akhil PC Model
(Default)		 #71
A
Staff adjustment delay (Week)
= TIME STEP
Description: The time required for a person to move from one activity to a different activity. The delay represents the assumption that a worker cannot instantly move from one activity to another but rather gradually decreases their effort on the "old" activity while simultaneously increasing their effort on the "new" activity. For simplicity the model is initially calibrated with the smallest possible delay (TIME STEP) to simulate no delay.
Present in 1 view: Used by:
  • Adjust Capability Staff - Adjusts the capability staff on the project. The adjustment is assumed to occur over the staff delay time.
  • Adjust design staff - Adjusts the design staff on the project. The adjustment is assumed to occur over the staff delay time. If the design staff gap is negative the actual design staff is reduced.
  • Adjust quality assurance staff - Adjusts the quality assurance staff on the project. The adjustment is assumed to occur over the staff delay time. If the quality assurance staff gap is negative the actual quality assurance staff is reduced.
  • Adjust rework staff - Adjusts the rework staff on the project. The adjustment is assumed to occur over the staff delay time. If the rework staff gap is negative the actual rework staff is reduced.
Default Control #72
C
TIME STEP (Week [0,?])
= 0.03125
Description: The time step for the simulation.
Present in 1 view: Used by:
  • SAVEPER - The frequency with which output is stored.
  • Staff adjustment delay - The time required for a person to move from one activity to a different activity. The delay represents the assumption that a worker cannot instantly move from one activity to another but rather gradually decreases their effort on the "old" activity while simultaneously increasing their effort on the "new" activity. For simplicity the model is initially calibrated with the smallest possible delay (TIME STEP) to simulate no delay.
Default Akhil PC Model
(Default)		 #73
L
Work Released (work packages)
= ∫approve packages dt + [0]
Description: The number of work packages that have been completed.
Present in 1 view: Used by:
  • add to duration - Adds to the project duration if the amount of work released is less then the work required to be completed before the project can be considered complete.

List of 1 Supplementary Variable

Module
Group
Type
 Supplementary Variable (1)
Default Akhil PC Model L Project Duration (Week)

List of 1 Variable Using IF...THEN...ELSE Function

Module
Group
Type
 Variable (1)
Default Akhil PC Model F,A add to duration (Week/Week)

List of 7 Variables Using MIN or MAX Functions

Module
Group
Type
 Undocumented Variable (7)
Default Akhil PC Model F,A design packages (work packages/Week)
Default Akhil PC Model A Fraction of work packages discovered to require rework (Dmnl [0,1])
Default Akhil PC Model A Min design duration (Week [0,2])
Default Akhil PC Model A Min quality assurance duration (Week [0,2])
Default Akhil PC Model A min rework duration (Week [0,2])
Default Akhil PC Model A Quality Assurance rate (work packages/Week)
Default Akhil PC Model F,A rework rate (work packages/Week)

List of 62 Variables Without Predefined Min or Max Values

Module
Group
Type
 Undocumented Variable (62)
Default Akhil PC Model L Actual Capability Staff (person)
Default Akhil PC Model L Actual Design Staff (person)
Default Akhil PC Model L Actual Quality Assurance Staff (person)
Default Akhil PC Model L Actual Rework Staff (person)
Default Akhil PC Model F,A add to duration (Week/Week)
Default Akhil PC Model F,A Adjust Capability Staff (person/Week)
Default Akhil PC Model F,A Adjust design staff (person/Week)
Default Akhil PC Model F,A Adjust quality assurance staff (person/Week)
Default Akhil PC Model F,A Adjust rework staff (person/Week)
Default Akhil PC Model F,A approve packages (work packages/Week)
Default Akhil PC Model A Available Project Staff (person)
Default Akhil PC Model A Average Capability Loss Rate (1/Week)
Default Akhil PC Model L Capabilities (Dmnl)
Default Akhil PC Model F,A Capability Decrease (1/Week)
Default Akhil PC Model A Capability deficit fraction (Dmnl)
Default Akhil PC Model F,A Capability Increase (1/Week)
Default Akhil PC Model A Capability Resource Rate (1/Week)
Default Akhil PC Model C Capability Staff Effort Rate (Week/Week)
Default Akhil PC Model L "Design Backlog & WIP" (work packages)
Default Akhil PC Model F,A design packages (work packages/Week)
Default Akhil PC Model A design process rate (work packages/Week)
Default Akhil PC Model A Design resources rate (work packages/Week)
Default Akhil PC Model A Design staff gap (person)
Default Akhil PC Model A Desired Capability Staff (person)
Default Akhil PC Model A Desired design staff (person)
Default Akhil PC Model A Desired quality assurance staff (person)
Default Akhil PC Model A Desired rework staff (person)
Default Akhil PC Model F,A discover rework rate (work packages/Week)
Default Control C FINAL TIME (Week)
Default Akhil PC Model C "Fraction discovered to need rework - reference" (Dmnl)
Default Akhil PC Model A Fraction of project backlog in design (Dmnl)
Default Akhil PC Model A Fraction of project backlog in quality assurance (Dmnl)
Default Akhil PC Model A Fraction of project backlog in rework (Dmnl)
Default Akhil PC Model A Improvement Staff Productivity (1/person/Week)
Default Akhil PC Model LI,C Initial Capabilities (Dmnl)
Default Akhil PC Model LI,C Initial Capability Staff (person)
Default Control C INITIAL TIME (Week)
Default Akhil PC Model C Max fraction discovered to require rework (Dmnl)
Default Akhil PC Model C Maximum Capabilities (Dmnl)
Default Akhil PC Model C Min fraction discovered to require rework (Dmnl)
Default Akhil PC Model C Production Staff effort rate (Week/Week)
Default Akhil PC Model A project backlog (work packages)
Default Akhil PC Model L Project Duration (Week)
Default Akhil PC Model L "Quality Assurance Backlog & WIP" (work packages)
Default Akhil PC Model A Quality Assurance process rate (work packages/Week)
Default Akhil PC Model A Quality Assurance rate (work packages/Week)
Default Akhil PC Model A Quality Assurance resources rate (work packages/Week)
Default Akhil PC Model A Quality Assurance staff gap (person)
Default Akhil PC Model C Reference min design duration (Week)
Default Akhil PC Model C Reference min QA duration (Week)
Default Akhil PC Model C Reference min rework duration (Week)
Default Akhil PC Model L "Rework Backlog & WIP" (work packages)
Default Akhil PC Model A rework process rate (work packages/Week)
Default Akhil PC Model F,A rework rate (work packages/Week)
Default Akhil PC Model A Rework resources rate (work packages/Week)
Default Akhil PC Model A Rework staff gap (person)
Default Akhil PC Model C Sensitivity of Min design duration to Capability Defecit (Dmnl)
Default Akhil PC Model C Sensitivity of Min quality assurance duration to Capability Defecit (Dmnl)
Default Akhil PC Model C Sensitivity of min rework duration to capability deficity (Dmnl)
Default Akhil PC Model C Sensitivity of rework fraction to capabilities (Dmnl)
Default Akhil PC Model A Staff adjustment delay (Week)
Default Akhil PC Model L Work Released (work packages)

Formulation Complexity Summary (Violations of Richardson's Rule)

Module
Group
Type
 Variable
Complexity Score
Default Akhil PC Model A Rework resources rate (work packages/Week)
4
Default Akhil PC Model L "Quality Assurance Backlog & WIP" (work packages)
4
Default Akhil PC Model A Quality Assurance resources rate (work packages/Week)
4
Default Akhil PC Model A Design resources rate (work packages/Week)
4
Default Akhil PC Model A Fraction of work packages discovered to require rework (Dmnl [0,1])
5

List of 4 Equations with Embedded Data (0 and 1 constants ignored)

Module
Group
Type
 Variable (4)
Default Akhil PC Model A Average Capability Loss Rate (1/Week)
Default Akhil PC Model A Min design duration (Week [0,2])
Default Akhil PC Model A Min quality assurance duration (Week [0,2])
Default Akhil PC Model A min rework duration (Week [0,2])

List of 10 State Variables

Module
Group
Type
 Variable
Default Akhil PC Model L Actual Capability Staff (person)
Default Akhil PC Model L Actual Design Staff (person)
Default Akhil PC Model L Actual Quality Assurance Staff (person)
Default Akhil PC Model L Actual Rework Staff (person)
Default Akhil PC Model L Capabilities (Dmnl)
Default Akhil PC Model L "Design Backlog & WIP" (work packages)
Default Akhil PC Model L Project Duration (Week)
Default Akhil PC Model L "Quality Assurance Backlog & WIP" (work packages)
Default Akhil PC Model L "Rework Backlog & WIP" (work packages)
Default Akhil PC Model L Work Released (work packages)

List of 2 Views and Their 73 Variables




 
Work flows
Resources
  
Total: 54 48 :Total
Actual Capability Staff (in 1 view)   X Actual Capability Staff (in 1 view)
Actual Design Staff (in 1 view)   X Actual Design Staff (in 1 view)
Actual Quality Assurance Staff (in 1 view)   X Actual Quality Assurance Staff (in 1 view)
Actual Rework Staff (in 1 view)   X Actual Rework Staff (in 1 view)
add to duration (in 1 view) X   add to duration (in 1 view)
Adjust Capability Staff (in 1 view)   X Adjust Capability Staff (in 1 view)
Adjust design staff (in 1 view)   X Adjust design staff (in 1 view)
Adjust quality assurance staff (in 1 view)   X Adjust quality assurance staff (in 1 view)
Adjust rework staff (in 1 view)   X Adjust rework staff (in 1 view)
approve packages (in 1 view) X   approve packages (in 1 view)
Available Project Staff (in 1 view)   X Available Project Staff (in 1 view)
Average Capability Loss Rate (in 2 views) X X Average Capability Loss Rate (in 2 views)
Capabilities (in 2 views) X X Capabilities (in 2 views)
Capability Decrease (in 1 view) X   Capability Decrease (in 1 view)
Capability deficit fraction (in 1 view) X   Capability deficit fraction (in 1 view)
Capability Increase (in 1 view) X   Capability Increase (in 1 view)
Capability Resource Rate (in 2 views) X X Capability Resource Rate (in 2 views)
Capability Staff Effort Rate (in 1 view)   X Capability Staff Effort Rate (in 1 view)
Design Backlog & WIP (in 2 views) X X Design Backlog & WIP (in 2 views)
design packages (in 1 view) X   design packages (in 1 view)
design process rate (in 1 view) X   design process rate (in 1 view)
Design resources rate (in 2 views) X X Design resources rate (in 2 views)
Design staff gap (in 1 view)   X Design staff gap (in 1 view)
Desired Capability Staff (in 1 view)   X Desired Capability Staff (in 1 view)
Desired design staff (in 1 view)   X Desired design staff (in 1 view)
Desired quality assurance staff (in 1 view)   X Desired quality assurance staff (in 1 view)
Desired rework staff (in 1 view)   X Desired rework staff (in 1 view)
discover rework rate (in 1 view) X   discover rework rate (in 1 view)
FINAL TIME (in 0 views)     FINAL TIME (in 0 views)
Fraction discovered to need rework - reference (in 1 view) X   Fraction discovered to need rework - reference (in 1 view)
Fraction of project backlog in design (in 1 view)   X Fraction of project backlog in design (in 1 view)
Fraction of project backlog in quality assurance (in 1 view)   X Fraction of project backlog in quality assurance (in 1 view)
Fraction of project backlog in rework (in 1 view)   X Fraction of project backlog in rework (in 1 view)
Fraction of work packages discovered to require rework (in 1 view) X   Fraction of work packages discovered to require rework (in 1 view)
Improvement Staff Productivity (in 1 view)   X Improvement Staff Productivity (in 1 view)
Initial Capabilities (in 2 views) X X Initial Capabilities (in 2 views)
Initial Capability Staff (in 1 view)   X Initial Capability Staff (in 1 view)
INITIAL TIME (in 0 views)     INITIAL TIME (in 0 views)
Max fraction discovered to require rework (in 1 view) X   Max fraction discovered to require rework (in 1 view)
Maximum Capabilities (in 2 views) X X Maximum Capabilities (in 2 views)
Min design duration (in 1 view) X   Min design duration (in 1 view)
Min fraction discovered to require rework (in 1 view) X   Min fraction discovered to require rework (in 1 view)
Min quality assurance duration (in 1 view) X   Min quality assurance duration (in 1 view)
min rework duration (in 1 view) X   min rework duration (in 1 view)
Production Staff effort rate (in 1 view)   X Production Staff effort rate (in 1 view)
Production Staff Productivity (in 1 view)   X Production Staff Productivity (in 1 view)
project backlog (in 1 view)   X project backlog (in 1 view)
Project Duration (in 1 view) X   Project Duration (in 1 view)
Project scope (in 1 view) X   Project scope (in 1 view)
Project staff (in 1 view)   X Project staff (in 1 view)
Quality Assurance Backlog & WIP (in 2 views) X X Quality Assurance Backlog & WIP (in 2 views)
Quality Assurance process rate (in 1 view) X   Quality Assurance process rate (in 1 view)
Quality Assurance rate (in 1 view) X   Quality Assurance rate (in 1 view)
Quality Assurance resources rate (in 2 views) X X Quality Assurance resources rate (in 2 views)
Quality Assurance staff gap (in 1 view)   X Quality Assurance staff gap (in 1 view)
Reference Fraction of Effort to Output (in 2 views) X X Reference Fraction of Effort to Output (in 2 views)
Reference min design duration (in 1 view) X   Reference min design duration (in 1 view)
Reference min QA duration (in 1 view) X   Reference min QA duration (in 1 view)
Reference min rework duration (in 1 view) X   Reference min rework duration (in 1 view)
Rework Backlog & WIP (in 2 views) X X Rework Backlog & WIP (in 2 views)
rework process rate (in 1 view) X   rework process rate (in 1 view)
rework rate (in 1 view) X   rework rate (in 1 view)
Rework resources rate (in 2 views) X X Rework resources rate (in 2 views)
Rework staff gap (in 1 view)   X Rework staff gap (in 1 view)
SAVEPER (in 0 views)     SAVEPER (in 0 views)
Scope fraction required to be considered completed (in 1 view) X   Scope fraction required to be considered completed (in 1 view)
Sensitivity of Min design duration to Capability Defecit (in 1 view) X   Sensitivity of Min design duration to Capability Defecit (in 1 view)
Sensitivity of Min quality assurance duration to Capability Defecit (in 1 view) X   Sensitivity of Min quality assurance duration to Capability Defecit (in 1 view)
Sensitivity of min rework duration to capability deficity (in 1 view) X   Sensitivity of min rework duration to capability deficity (in 1 view)
Sensitivity of rework fraction to capabilities (in 1 view) X   Sensitivity of rework fraction to capabilities (in 1 view)
Staff adjustment delay (in 1 view)   X Staff adjustment delay (in 1 view)
TIME STEP (in 1 view)   X TIME STEP (in 1 view)
Work Released (in 1 view) X   Work Released (in 1 view)
Total: 54 48 :Total
 
Work flows
Resources
  

* Includes Time, if used in a view. Excludes variables not present in any view.

Level Structure †

Actual Capability Staff = ∫Adjust Capability Staff dt + [Initial Capability Staff]
Initial Capability Staff = 1
    Adjust Capability Staff = ((Desired Capability Staff-Actual Capability Staff)/Staff adjustment delay)

Actual Design Staff = ∫Adjust design staff dt + [Project staff]
Project staff = 20
    Adjust design staff = (Design staff gap/Staff adjustment delay)

Actual Quality Assurance Staff = ∫Adjust quality assurance staff dt + [0]
    Adjust quality assurance staff = Quality Assurance staff gap/Staff adjustment delay

Actual Rework Staff = ∫Adjust rework staff dt + [0]
    Adjust rework staff = (Rework staff gap/Staff adjustment delay)

Capabilities = ∫Capability Increase-Capability Decrease dt + [Initial Capabilities]
Initial Capabilities = 1
    Capability Decrease = Capabilities*Average Capability Loss Rate
    Capability Increase = Capability Resource Rate*(Maximum Capabilities-Capabilities)/Maximum Capabilities

"Design Backlog & WIP" = ∫-design packages dt + [Project scope]
Project scope = 500
    design packages = MIN(design process rate,Design resources rate)

Project Duration = ∫add to duration dt + [0]
    add to duration = IF THEN ELSE(Work Released<Scope fraction required to be considered completed*Project scope, 1 , 0 )

"Quality Assurance Backlog & WIP" = ∫design packages+rework rate-approve packages-discover rework rate dt + [0]
    approve packages = Quality Assurance rate-discover rework rate
    discover rework rate = Fraction of work packages discovered to require rework*Quality Assurance rate
    rework rate = MIN(rework process rate,Rework resources rate)

"Rework Backlog & WIP" = ∫discover rework rate-rework rate dt + [0]

Work Released = ∫approve packages dt + [0]

†  Level Structure Report still under development.

List of 17 Equations with Dimensionless Units

Module
Group
Type
 Variable
Default Akhil PC Model L Capabilities (Dmnl)
Default Akhil PC Model A Capability deficit fraction (Dmnl)
Default Akhil PC Model C "Fraction discovered to need rework - reference" (Dmnl)
Default Akhil PC Model A Fraction of project backlog in design (Dmnl)
Default Akhil PC Model A Fraction of project backlog in quality assurance (Dmnl)
Default Akhil PC Model A Fraction of project backlog in rework (Dmnl)
Default Akhil PC Model A Fraction of work packages discovered to require rework (Dmnl [0,1])
Default Akhil PC Model LI,C Initial Capabilities (Dmnl)
Default Akhil PC Model C Max fraction discovered to require rework (Dmnl)
Default Akhil PC Model C Maximum Capabilities (Dmnl)
Default Akhil PC Model C Min fraction discovered to require rework (Dmnl)
Default Akhil PC Model C Reference Fraction of Effort to Output (Dmnl [0,1])
Default Akhil PC Model C Scope fraction required to be considered completed (Dmnl [0,1])
Default Akhil PC Model C Sensitivity of Min design duration to Capability Defecit (Dmnl)
Default Akhil PC Model C Sensitivity of Min quality assurance duration to Capability Defecit (Dmnl)
Default Akhil PC Model C Sensitivity of min rework duration to capability deficity (Dmnl)
Default Akhil PC Model C Sensitivity of rework fraction to capabilities (Dmnl)
Source file: Akhil PC Model.mdl (21Feb2020 - 8:57:24 AM)
Report Created on 21-Feb-2020 - 8:57:34 AM
SDM-Doc Tool Version 5.0
Decision and Information Sciences Division
Argonne National Laboratory