AltaRica 3 Based Models for ISO 26262 Automotive Safety Mechanisms
Cars embed a steadily increasing number of Electric and Electronic Systems. The ISO 26262 defines a number of constraints, rules and requirements that the development of Automotive E/E Systems must obey in order to guaranty their Functional Safety. One of the means at hand to enhance the safety of these systems is to reinforce them with so-called Safety Mechanisms. The Standard discusses at length how to estimate the contribution of these mechanisms to Functional Safety. These calculations rely however on Fault Tree models or ad-hoc formulas that are hard to check for completeness and validity. In this article, we propose generic AltaRica 3 for Electric and Electronic Systems protected by first and second order safety mechanisms. These models are of a great help to clarify the behavior of these systems as well as to determine the domain of validity of simpler models such the above mentioned Fault Trees or ad-hoc formulas.
KeywordsAutomotive Functional Safety ISO 26262 Safety Mechanisms AltaRica Markov Models
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