Reuse model used to compute the effort of integrating reusable components.Early design model used when requirements are available but the design has not yet started.Application composition model used when software is composed of existing parts. COCOMO 2 incorporates a range of sub-models that produce increasingly detailed software estimates. COCOMO 2 takes into account different approaches to software development, reuse, etc. A long history from the initial version published in 1981 (COCOMO-81) through various instantiations to COCOMO 2. It is a well-documented, 'independent' model which is not tied to a specific software vendor. COCOMO (Constructive Cost Modeling) cost modeling is an empirical model based on project experience.
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