ABSTRACT
Structured design is concerned with physical design based on the results of structured analysis. More generally, structured analysis transforms the abstract problem into a feasible logical design, while structured design concentrates on converting the logical design into a physical information system. Structured analysis and design may be the best known analysis and design methodology. A key objective of structured design is to define loosely coupled, independent modules. Generally, a module’s degree of independence is inversely proportional to the number of data elements that flow between the module and the rest of the system. The afferent, efferent, transform, and coordinate modules are identified first. Grouping the modules to form a control structure might involve designating one module as the master or creating a new master. The purpose of transaction analysis is to group all modules triggered by the same transaction to form a transaction center.
