Abstract
A study of information systems managers and other information systems professionals at 112 different organizations confirmed that information systems software cost estimating is an important concern. Subjects reported the completion of only one of every four systems development projects within their estimates. According to them, the major cause of inaccurate estimates was changes in user requirements. Organizations using sophisticated cost estimating software packages were less successful at preventing large cost overruns than organizations not using them. However, the use of the estimator as system developer, the careful monitoring of systems development projects, and the inclusion in performance evaluations of success in meeting estimates were associated with more accurate cost estimating.
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