Abstract
Validation and Verification are necessary in the life cycle of any safety-critical software system. It answers the question of “are we building the right product?” It's very important to be able to decide if its outputs are correct and system meets specifications, failing to do so can result in loss of human lives or huge financial loss. V&V process and its planning must start early in SDLC (Software Development Life Cycle). Both aspects are essential, If specifications are met that doesn't mean it's correct and vice versa. There are different V&V techniques available for different stages of the SDLC. In this paper I will analyze different V&V techniques available for critical software systems and will conduct a survey, which will produce results showing which techniques are best for safety-critical software systems.
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