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A review of software surveys on software effort estimation

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2 Author(s)
Molokken, K. ; Simula Res. Lab., Lysaker, Norway ; Jorgensen, M.

This paper summarizes estimation knowledge through a review of surveys on software effort estimation. Main findings were that: (1) most projects (60-80%) encounter effort and/or schedule overruns. The overruns, however, seem to be lower than the overruns reported by some consultancy companies. For example, Standish Group's "Chaos Report" describes an average cost overrun of 89%, which is much higher than the average overruns found in other surveys, i.e. 3040%. (2) The estimation methods in most frequent use of expert judgment is that there is no evidence that formal estimation models lead to more accurate estimates. (3) There is a lack of surveys including extensive analyses of the reasons for effort and schedule overruns.

Published in:

Empirical Software Engineering, 2003. ISESE 2003. Proceedings. 2003 International Symposium on

Date of Conference:

30 Sept.-1 Oct. 2003

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