【71-75】(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system.(73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74).(75) is another such technique that integrates data and process concerns into constructs called objects.