Systems architecting is not like mathematics since systems architecting issues have commonly never only true or false answers, which may be disorientating for the beginner. A systems architecture process does indeed classically lead to many different possible and valuable solutions. So the core questions in systems architecting are always choice and decision among these various options. The key point is of course to be able to make these choices and decisions in the most rational possible way, which is the main purpose of systems architecting and of this pocket guide...