A Software Safety Model for Safety Critical Applications

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Executive Summary

Software has become responsible for most of the critical functions of complex systems. Software safety is the notion that software will execute within a system context without contributing to hazards. Software for safety-critical systems must deal with the hazards identified by safety analysis in order to make the system safe. Software safety is a composite of many criteria. Existing software quality models like McCall's and Boehm's and ISO 9126 are inadequate in addressing the software safety issues of real time safety-critical embedded systems. At present, there does not exist any standard model that comprehensively addresses the Factors, Criteria and Metrics (FCM) approach of the quality models in respect of software safety.

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