Layer-cake testing, or how business frameworx help to organize landscape testing

I`ve been testing heterogeneous Software within OSS cluster of Deutche Telekom landscape for about four years. Our main goal is testing of high level business cases, which flow through many software instances and are supposed to have forks in most cases. The point of my discourse is to share some hands-on experience concerning test process buildup in above defined conditions, in particular how work streams and team competence areas are organized according to reference models provided by Business Process Framework.