#GBARRY BOEHM’S ESTIMATION MODEL AND THE BASIC COCOMO MODEL SOFTWARE#
The first level, Basic COCOMO is good for quick, early, rough order of magnitude estimates of software costs, but its accuracy is limited due to its lack of factors to account for difference in project attributes (Cost Drivers). This article refers to COCOMO 81.COCOMO consists of a hierarchy of three increasingly detailed and accurate forms. The need for the new model came 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.
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It provides more support for modern software development processes and an updated project database. COCOMO II is the successor of COCOMO 81 and is better suited for estimating modern software development projects. In 1997 COCOMO II was developed and finally published in 2000 in the book Software Cost Estimation with COCOMO II.
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References to this model typically call it COCOMO 81. These projects were based on the waterfall model of software development which was the prevalent software development process in 1981.
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Boehm's Book Software engineering economics as a model for estimating effort, cost, and schedule for software projects. The model uses a basic regression formula, with parameters that are derived from historical project data and current project characteristics.COCOMO was first published in 1981 Barry W. The Constructive Cost Model (COCOMO) is an algorithmic software cost estimation model developed by Barry Boehm.