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Copyright © Risknowlogy®. All rights reserved. v9
Quick revision - the essentials of functional safety
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Know how much risk your hazards pose
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Work out how much risk reduction you need
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To be tolerable
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To be tolerable if ALARP (in HSE speak “TIFALARP”)
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Design and build something that gives you the right amount of risk reduction
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Operate, Maintain, Inspect, (Proof) Test and Repair to ensure it keeps giving that
level of risk reduction
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Not forgetting Functional Safety Management, verification, functional safety
assessments & audits, & competency.
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