Weaving multiple viewpoints specifications in goal oriented requirements analysis

Goal oriented requirements analysis is one of the use-ful method to bridge the gaps between stakeholders needs and a requirements specification. Goals are structured as a directed graph, and its upper parts show the needs and its lower parts show the requirements. Although goals come from several different viewpoints, such viewpoints are not separated explicitly in such a goal graph. As a result, fol-lowing kinds of problems can be occurred. First, we cannot easily remove or modify one viewpoint which affects sev-eral different goals. Second, it is difficult to analyze several different viewpoints separately and/or incrementally. For example, we cannot analyze a family of products simulta-neously. Third, such a graph is not intrinsically scalable. In this paper, we propose a method to weave several goal graphs each of which represents a viewpoint. Several candi-dates of a weaved graph are systematically generated based on the structural characteristics of graphs for each view-point. By using this method, We can overcome the problems above, and we can easily propose alternative requirements specification if a specification is rejected by stakeholders. keywords requirements elicitation, goal oriented re-quirements analysis, multiple viewpoints, aspect-oriented requirements analysis