System structure design is driven by user requirements and the business results of analysis. The business processes defined in analysis can be mapped to procedures and then organized so that users can perform those procedures in the most effective and natural way.
As design work proceeds, the basic system structure that supports business processes continues to evolve. Additional procedures needed to provide reports, business and operational controls, conversion of current data, inter-working with current and packaged systems, bridging between new procedures and current data stores augment the structure.
After you have identified the need for a procedure, whatever its purpose, you use the same techniques for that procedure's detailed definition and construction.
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