Safeware: system safety and computers
Safeware: system safety and computers
The B-book: assigning programs to meanings
The B-book: assigning programs to meanings
Safety Critical Computer Systems
Safety Critical Computer Systems
Formal Specification and Synthesis of Procedural Controllers for Process Systems
Formal Specification and Synthesis of Procedural Controllers for Process Systems
Software Design Methods for Concurrent and Real-Time Systems
Software Design Methods for Concurrent and Real-Time Systems
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Once a hazard analysis of a system has been undertaken and a list of safety properties that it must satisfy derived, can this be used to obtain properties which a software controller for the system must satisfy? In addition, what evidential value for the safety of a system are proofs of correctness of a formal specification of its software components? We will examine these issues in the context of a specification and development technique for the B formal specification language, which has been used to specify and design discrete event control systems for batch-processing plants. A simple example is used to illustrate the ideas. The results obtained from a larger case study are also presented.