Estimates cost in time for software development using either Function Points, Basic COCOMO, or Intermediate COCOMO.
The cli version is built in C++. To view the documentation for it click here
The web version is built in JavaScript and is much easier to use since it has a GUI.
To use the web version, you can simply click here and start using it immediately inside of your browser.
N = number of that type of component
C = component complexity value
I = influence value
Unadjusted Function Points (UFP) = (N0 x C0) + (N1 x C1) + (N2 x C2)...
Degree of Influence (DI) = I0 + I1 + I2 + ... + I14
Technical Complexity Factor (TCF) = 0.65 + (0.01 x DI)
Adjusted Function Points (FP)= UFP x TCF
| Component | Simple | Average | Complex |
|---|---|---|---|
| Input item | 3 | 4 | 6 |
| Output item | 4 | 5 | 7 |
| Inquiry | 3 | 4 | 6 |
| Master file | 7 | 10 | 15 |
| Interface | 5 | 7 | 10 |
These are used for degrees of influence and range from values 0 for no influence to 5 for strong influence
- Data communication
- Distributed data processing
- Performance criteria
- Heavily utilized hardware
- High transaction rates
- Online data entry
- End-user efficiency
- Online updating
- Complex computations
- Reusability
- Ease of installation
- Ease of operation
- Portability
- Maintainability
KDSI = estimated lines of code in thousands
A and B are constants given by project size.
Person-Months = A x KDSI B
| Type | Size | A | B |
|---|---|---|---|
| Organic | Small | 2.4 | 1.05 |
| Semi-detached | Medium | 3.0 | 1.12 |
| Embedded | Complex | 3.6 | 1.20 |
KDSI = estimated lines of code in thousands
A and B are constants given by project size.
Person-Months (basic) = A x KDSI B
C = cost driver complexity score
Cost Driver Total = C0 * C1 * C2 * ... * C14
Person-Months (intermediate) = Person-Months (basic) x Cost Driver Total
| Type | Size | A | B |
|---|---|---|---|
| Organic | Small | 3.2 | 1.05 |
| Semi-detached | Medium | 3.0 | 1.12 |
| Embedded | Complex | 2.8 | 1.20 |
| Cost Driver | Very Low | Low | Nominal | High | Very High | Extra High |
|---|---|---|---|---|---|---|
| Required software reliability | 0.75 | 0.88 | 1.00 | 1.15 | 1.40 | |
| Database size | 0.94 | 1.00 | 1.08 | 1.16 | ||
| Product complexity | 0.70 | 0.85 | 1.00 | 1.15 | 1.30 | 1.65 |
| Execution time constraint | 1.00 | 1.11 | 1.30 | 1.66 | ||
| Main storage constraint | 1.00 | 1.06 | 1.21 | 1.56 | ||
| Virtual machine volatility | 0.87 | 1.00 | 1.15 | 1.30 | ||
| Computer turnaround time | 0.87 | 1.00 | 1.07 | 1.15 | ||
| Analyst capabilities | 1.46 | 1.19 | 1.00 | 0.86 | 0.71 | |
| Applications experience | 1.29 | 1.13 | 1.00 | 0.91 | 0.82 | |
| Programmer capability | 1.42 | 1.17 | 1.00 | 0.86 | 0.70 | |
| Virtual machine experience | 1.21 | 1.10 | 1.00 | 0.90 | ||
| Programming language experience | 1.14 | 1.07 | 1.00 | 0.95 | ||
| Use of modern programming practices | 1.24 | 1.10 | 1.00 | 0.91 | 0.82 | |
| Use of software tools | 1.24 | 1.10 | 1.00 | 0.91 | 0.83 | |
| Required development schedule | 1.23 | 1.08 | 1.00 | 1.04 | 1.10 |