ITPEC FE Subject A April 2025 Question 42
ITPEC FE Subject A April 2025 — Question 42 of 60
COCOMO (COnstructive COst MOdel) takes software size (in KLOC) as input and estimates effort (person-months) and duration.
- •
Effort = a × (KLOC)^b - •
Duration = c × (Effort)^d
The chain is: Size → Effort → Duration.
Why not others:
- (b) Effort is derived from size, not from duration
- (c) Size is the input, not an output — this reverses the model
- (d) Same issue — size and effort cannot be derived from duration alone
Key rule: COCOMO: Size (KLOC) is always the input; effort and duration are the outputs.
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