Software requirements and specifications michael jackson pdf
Determining the Specification of a Control System from That of Its Environment | SpringerLinkWell understood methods exist for developing programs from given specifications. A formal method identifies proof obligations at each development step: if all such proof obligations are discharged, a precisely defined class of errors can be excluded from the final program. For a class of "closed" systems such methods offer a gold standard against which less formal approaches can be measured. For "open" systems -those which interact with the physical world- the task of obtaining the program specification can be as challenging as the task of deriving the program. And, when a system of this class must tolerate certain kinds of unreliability in the physical world, it is still more challenging to reach confidence that the specification obtained is adequate. We argue that widening the notion of software development to include specifying the behaviour of the relevant parts of the physical world gives a way to derive the specification of a control system and also to record precisely the assumptions being made about the world outside the computer.
Video 23 - The Software Requirements Specification
Problem Analysis and the Problem Frames Approach
Problem analysis or the problem frames approach is an approach to software requirements analysis. It was developed by British software consultant Michael A. Jackson in the s. One outcome of that workshop was a special issue on problem frames in the International Journal of Information and Software Technology. IWAAPO broadens the focus of the workshops to include alternative and complementary approaches to software development that share an emphasis on problem analysis. The ideas in the problem frames approach have been generalized into the concepts of problem-oriented development POD and problem-oriented engineering POE , of which problem-oriented software engineering POSE is a particular sub-category.
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