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Strategies for Real-Time System Specification by Imtiaz A. Pirbhai, Derek J. Hatley

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Chapter 14. Preparing Control Specifications

14.1 Avoiding Control Specifications

In Sections 11.2 and 12.8, we have described the benefits of de-emphasizing the control model. Although this chapter addresses the preparation of CSPECs, it is worth reminding ourselves that we will put a CSPEC together only when we have thoroughly satisfied ourselves that it is really needed. In other words, we will put a CSPEC together only when we have satisfied ourselves that the requirement cannot be represented using the simple data triggered structured analysis model; that the decisions involved cannot easily be incorporated into one or more PSPECs, using simple IF statements; and that the requirement involves decisions affecting relatively major operating ...

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