Abstract
The aim of this paper is to propose a consensual model of software safety requirements for decomposition and allocation of system safety integrity levels of quality. For this purpose, a procedural method is used for describing and evaluating the proposed model of software safety requirements; using a strategy that is based neither on our own views nor on individual researchers view of such type of requirements, but that is based on a consensus perspectives documented in international standards of software safety as quality requirements. This work contributes to the research knowledge by proposing a model that guides in practice both system and software engineers for early identification and specification of the software safety non functional requirements and their detailed allocation as specific safety functions.
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