（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.
（75）处填（）。
A．Structured analysis
B．Information Engineering
C．Discovery Prototyping
D．Object-Oriented analysis