This paper provides an introduction to the development of software for safety critical systems. It aims to serve as a tutorial for developers who are new to the development of software for safety critical systems, discussing the issues involved, introducing some of the techniques available to developers, and providing an overview of how QA Systems’ tool, Cantata, can be used to assist with the development of software for safety critical systems.
A safety critical system is a system where human safety is dependent upon the correct operation of the system. The emphasis of this paper is on the software element of safety critical systems, which for convenience, is often referred to as safety critical software. However, safety must always be considered with respect to the whole system, including software, computer hardware, other electronic and electrical hardware, mechanical hardware, and operators or users, not just the software element.
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