Abstract
The software development project is strengthening the tendency of the formation of small-scale-sizing and short time for delivery in recent years, and importance of estimation just increases. In the initial stage of a project, it is an important factor for a project success to estimate the development scale of software appropriately, and many examples which apply a function point as the technique of the scale estimate of software are reported. Writers started with introduction of a simple function point, and carried out even trial of the estimated model in the initial stage of a project through collection of actual result data, and analysis, establishment of the development productivity index based on an analysis result and decision of an estimated model. In order to model the relation between FP and a man day appropriately for the purpose of performing the estimate by FP, it is necessary to reflect many factors which affect productivity. In this paper, it proposes about the procedure of effective modeling for attaining the purpose based on experience which was estimated and was obtained by trial.
