(2) Pursue uniformity on the outside while allowing diversity on the inside. (3) Evolve services and their organization in response to real use. (Ali Arsanjani, Grady Booch, Toufic Boubez, Paul C. Brown, David Chappell, John deVadoss, Thomas Erl, Nicolai Josuttis, Dirk Krafzig, Mark Little, Brian Loesgen, Anne Thomas Manes, Joe McKendrick, Steve Ross-Talbot, Stefan Tilkov, Clemens Utschig-Utschi, 2013). Now how can