Discussion
Consider a software project with the following information domain characteristics for calculation of function point metric
Number of external inputs (I) = 30
Number of external outputs (O) = 60
Number of external inquiries (E) = 23
Number of files (F) = 08
Number of external interfaces (N) = 02
It is given that the complexity weighting factors for I, O, E, F and N are 4, 5, 4, 10 and 7, respectively. It is also given that, out of fourteen value adjustment factors that influence the development effort, four factors are not applicable, each of the other four factors have value 3, and each of the remaining factors have value 4. The computed value of function point metric is
Answer: A
The function point value is 612.06.
Unadjusted function points, then the value adjustment, with 4 factors at 0, 4 at 3 and the other 6 at 4:
\[ \begin{aligned} UFP &= 30(4) + 60(5) + 23(4) + 8(10) + 2(7) \\ &= 120 + 300 + 92 + 80 + 14 = 606 \\ \sum F &= 4(3) + 6(4) = 36 \\ VAF &= 0.65 + 0.01 \times 36 = 1.01 \\ FP &= 606 \times 1.01 = 612.06 \end{aligned} \]
606 is the unadjusted count, 1.01 the adjustment factor and 0.65 its constant, so none of them is the function point value.
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