11. The method of re-architecting the legacy system of claim 1 , wherein the plurality of pattern instances are stored in an instance-repository.
11. The method of re-architecting the legacy system of claim 1 , wherein the plurality of pattern instances are stored in an instance-repository. 12. The method of re-architecting the legacy system of claim 11 , wherein the instance-repository is updated by optimization of the plurality of pattern instances.