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COCOMO Software Cost Estimation Model

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Development and Evolution: COCOMO was developed by Barry W. Boehm in late 1970s
COCOMO 81 used 63 projects at TRW Aerospace in 1981
COCOMO II was developed in 1995 and published in 2000
COCOMO II used 161 projects to support modern development processes
Model Structure: Basic COCOMO provides quick estimates but lacks accuracy factors
Intermediate COCOMO considers project attributes and cost drivers
Detailed COCOMO accounts for individual project phases
Complete COCOMO addresses shortcomings of Basic and Intermediate
Cost Drivers: Model includes 15 attributes rated on six-point scale
Each attribute has multiple subsidiary attributes
Effort adjustment factor (EAF) ranges from 0.9 to 1.4
EAF combines effort multipliers for different attributes