The design procedure refers to the genuine creation of specification. While the analyst is satisfied along with the model, a detailed requirement can then be constructed. It is done via concisely explaining each activity comprising its non-functional aspects and further explaining how these activities are concerned to each other. The process is repeated for all the demonstration and the result acquired is ordered to provide a complete specification of the system.
The SADT methodology is a well established approach, and due to its simplicity this has attracted a broad range of industrial users.