Product software implementation method result in ambiguity when questions arise in the execution of the implementation process. On the other hand methods can be used as a profession, meaning that the method should be taken strict and the usage of the method should be a profession, instead of a guiding principle. This view is very useful if the implementation process is very complex and is very dependent on exact and precise acting. Organizational and quality management will embrace this view, as a strict usage of any method results in more clarity on organizational level. Change management however might indicate that more flexibility in an
Classification Tree Method the Category Partition Method (CPM) by Olstrad and Balcer: The classification tree method first was intended for the design and specification of abstract test cases. With the classification tree method for embedded systems, test implementation can also be performed. Several additional features are integrated with the method: The module and unit testing tool Tessy relies on this extension. One way of modelling constraints is using the refinement mechanism in the classification tree method. This, however, does not allow for modelling constraints between classes of different classifications. Lehmann and Wegener introduced Dependency Rules based on Boolean expressions with their incarnation of