The basic version of the Construction Cost Model (COCOMO), which proposes quantitative, life-cycle
relationships, performs what function?

A.
Estimates software development effort and cost as a function of the size of the software product
in source instructions modified by manpower buildup and productivity factors

B.
Estimates software development effort and cost as a function of the size of the software product
in source instructions modified by hardware and input functions

C.
Estimates software development effort based on user function categories

D.
Estimates software development effort and cost as a function of the size of the software product
in source instructions

Explanation:
The Basic COCOMO Model (B.W. Boehm, Software Engineering Economics, Prentice-Hall, Englewood
Cliffs, New Jersey, 1981) proposes the following equations: The number of man-months (MM)
required to develop the most common type of software product, in terms of the number of
thousands of delivered source instructions (KDSI) in the software product MM = 2.4 (KDSI)1.05 The
development schedule (TDEV) in months TDEV = 2.5(MM)0.38 In addition, Boehm has developed an
intermediate COCOMO Model that also takes into account hardware constraints, personnel quality,
use of modern tools, and other attributes and their aggregate impact on overall project costs. A
detailed COCOMO Model, by Boehm, accounts for the effects of the additional factors used in the
intermediate model on the costs of individual project phases.