Jones First-Order Estimation Practice
Capers Jones developed a practice called First-Order Estimation. It is based on his analysis of his database of several thousand projects. He created a series of exponents that can be used on the FP size calculations to calculate a rough schedule estimate.
| Kind of Software | Best in Class | Average | Worst in Class |
|---|---|---|---|
| Systems | 0.43 | 0.45 | 0.48 |
| Business | 0.41 | 0.43 | 0.46 |
| Shrink-wrap | 0.39 | 0.42 | 0.45 |
For example if you have an average shrink-wrap project that has been estimated to have 350 Function Points then the estimated schedule time would be:
12 Months = 350^0.42
on 2009/07/29 23:43