Software cost modeling: Some lessons learned

Authors:
B. W. Boehm;R. W. Wolverton
Affiliations:
TRW Defense and Space Systems Group U.S.A.;TRW Defense and Space Systems Group U.S.A.
Venue:
Journal of Systems and Software
Year:
1984

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Abstract

This paper summarizes certain lessons we learned recently in developing a software cost estimation model for TRW. With respect to general needs in the cost estimation field, it was found particularly important and useful to address the following three needs: 1.1. to develop a set of well-defined, agreed-on criteria for the ''goodness'' of a software cost model; 2.2. to evaluate existing and future models with respect to these criteria; 3.3. to emphasize ''constructive'' models that relate their cost estimates to actual software phenomenology and project dynamics. This paper presents a set of criteria found to be particularly important in practical software cost estimation, together with examples of their importance.