Basic COCOMO is a form of the COCOMO model. Cocomo may be applied to three classes of software projects. These give a general impression of the software project.

The basic Cocomo equations take the form

:E=ab(KLOC)bb :D=cb(E)db :P=E/D

where E is the effort applied in person-months, D is the development time in chronological months, KLOC is the estimated number of delivered lines of code for the project (expressed in thousands), and P is the number of people required. The coefficients ab , bb , cb and db are given in the following table.

Software project a b b b c b d b Organic 2.4 1.05 2.5 0.38 Semi-detached 3.0 1.12 2.5 0.35 Embedded 3.6 1.20 2.5 0.32 Basic Cocomo is good for quick, early, rough order of magnitude estimates of software costs, but its accuracy is necessarily limited because of its lack of factors to account for differences in hardware constraints, personnel quality and experience, use of modern tools and techniques, and other project attributes known to have a significant influence on software costs.

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