The number of function points of a proposed system is calculated as 500.…

2016

The number of function points of a proposed system is calculated as 500. Suppose that the system is planned to be developed in Java and the LOC/FP ratio of Java is 50. Estimate the effort (E) required to complete the project using the effort formula of basic COCOMO given below :

E = a(KLOC)b

Assume that the values of a and b are 2.5 and 1.0 respectively.

  1. A.

    25 person months

  2. B.

    75 person months

  3. C.

    62.5 person months

  4. D.

    72.5 person months

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Correct answer: C

Solution: Compute LOC from function points, convert to KLOC, then apply the basic COCOMO formula.

  1. Compute total lines of code (LOC): 500 function points × 50 LOC/function point = 25,000 LOC.

  2. Convert LOC to KLOC: 25,000 LOC ÷ 1,000 = 25 KLOC.

  3. Apply the basic COCOMO effort formula E = a × (KLOC)^b with a = 2.5 and b = 1.0: E = 2.5 × (25)^1.0 = 2.5 × 25 = 62.5 person-months.

  4. Final answer: 62.5 person-months.

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