real-time systems, mixed criticality, review


This research review focuses mainly on papers that has investigated mixed criticality scheduling. In the following review, we will discuss each paper and its contribution to this topic. First, we need to define mixed criticality, system and what are standards that most of these contributions relied on. Mixed criticality RTS is based on the Vestal model developed by Vestal at Honeywell Lab. The goal of this model is to divide tasks based on their criticality which can simply mean how sever the consequences will be if a task misses its deadline. If we took avionics system for example, high criticality task can cause disrupt entire system or cause some malfunctioning. In contrast, low criticality tasks can tolerate missing deadline which mean some features might be disabled or produce inaccurate information occasionally. This concept is crucial for the certifying authority as it needs to ensure the safety of the overall system and verify high criticality tasks ensuring they will meet their deadline.


College of Engineering and Computer Science





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