Islamic Azad University
One challenge of XP agile method in software development is this method's underestimation over software quality attribution; these attributes are of main indices of software architecture. In this study, a method is represented for responding this challenge on the bases of probability theory. In this method, firstly, the rating matrix is structured on the bases of quality attributions an architecture solutions. Each element of this matrix shows a rating for every solution and the ratings will be initialized through Analytic Hierarchy Process (AHP). Via quality weight implement on above matrix the rating vector is created whose each element represents the rate of each solution in reaching those quality attributes in rating matrix.