O'Reilly logo

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

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 9. Requirements Model Interpretation and Summary

9.1 The Requirements Model Interpreted

In Section 4.8, we described the properties of the process model represented by the basic structured analysis method, and illustrated the primitive network concept. We have now described the control structure that has been added to the basic method, and here we will discuss how this extension affects the model.

The idea of an idealized, infinitely fast model is still retained. In this respect, the control structure is very similar to the data structure: CSPECs and PSPECs both convert their inputs to their outputs the instant those inputs occur. Likewise, a process is active the instant the activator from its CSPEC goes from False to True.

The primitive ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required