An Application Problem of Conflict between Contribution and Validity on Customers' Needs and The Resolution Method

Abstract

Without implementing needless functions, requirements that satisfy customers' needs need to be elicited in software development. However, a requirement that satisfies customers' needs does not always coincide with one that has high contribution for a goal of software development. Accordingly, conflict between contribution and validity on customers' needs should be detected at the step of requirements elicitation process before making requirements specification. Towards this problem, we have proposed a metric Dip(g) to detect this conflict based on goal-oriented requirements analysis method that is one of the requirements elicitation methods. But, because some application assessment of the method has not been reported, the application problems also have not been explicit. Hence, in this paper, we report that we discovered an application problem from the result of an application to an existing goal graph. Added to this, by reducing goal graph based on logical formulas, we propose a new method to resolve the discovered new problem.