The enhancement function point size of a changed transactional function is calculated from the function point size of the function after the change and the change impact factor. The impact factor is determined by the percentage changes in the numbers of DETs and FTRs used by the transaction.
If the change is cosmetic only, the number of changed DETs and FTRs is nil. The impact of such a change is considered minimal and the value of the impact factor (0.25) reflects a relatively low impact. However, the change will be included in the scope of the enhancement project.