Having defined the data objects and their relationships, the set of actions pertaining to each data object should be determined. Once this point is achieved, the high-level design of the application objects, and therefore of the application itself, is essentially complete, and should be documented and approved by all concerned parties before the detailed design of methods commences. Note that it is not necessary to define all of the applicable actions for each data object, since the essentially independent nature of methods allows additional actions to be added to an application object.