Web service business processes are a kind of service compositions considered as one of the most frequent form of service-oriented software architectures. In this paper, we present a method that helps software architects in the design of such service architectures. This method assists the architects in answering them by proposing some patterns achieving quality requirements. We consider in our work that quality can be achieved through patterns, which are specified with checkable/process able languages. Besides this, the method that we propose simulates the application of these patterns and notifies the architect with its consequences on the other implemented qualities. Published in: 2014