What is cocomo model?

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Meera Parigi

  • Oct 25th, 2007

COCOMO (COnstructive COst MOdel) has been designed in 1981 by Barry Boehm to given an estimate of the number of man-months it will take to develop a software product and it is referred as COCOMO 81

A new model called COCOMO II was designed in 1990 and the need for this model came up as software development technology moved from mainframe and overnight batch processing to desktop development, code re-usability and the use of off-the-shelf software components.

COCOMO consists of a hierarchy of 3 increasingly detailed and accurate forms:
1) Basic COCOMO - is a static, single valued model that computes software development effort and cost as a function of program size expressed in estimated lines of code

2) Intermediate COCOMO - computes software development effort as function of program size and a set of "cost drivers" that include subjective assessment of product, hardware, personnel and project attributes

3) Detailed COCOMO - incorporates all characteristics of the intermediate version with an assessment  of the cost driver's impact on each step in SDLC

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