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CFSE - Certified Functional Safety Engineering I - Participant's Notebook - Exida 2007

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Event Historv<br />

Application Standards<br />

Hazard Characteristics<br />

Conse uence Database<br />

Failure Probabilities<br />

2. !ndentlfy Potential<br />

Hazards<br />

Q<br />

q<br />

Potential Haza~<br />

Layers of Prole~<br />

Hazard FrequeniJ<br />

•Objective<br />

Assess likelihood based on all<br />

protection layers.<br />

•Tasks<br />

Identify Layers of Protection<br />

Use qualitative or quantitative methods<br />

lntiiltlnQ Pn>tectk>n IPrnteotbn Prntectlon<br />

Event Loyer 1 I !aver 2 Layer 3 OutJ;ome<br />

PUFais<br />

Pl3 Fa"'<br />

Aeoldentocc..s<br />

-..-.-..---!'!-2_Sucr:e5 I ARF, Target s!i]<br />

4 Objective<br />

Specify the required risk reduction, or<br />

difference between existing and<br />

tolerable risk levels- in terms of SIL<br />

4 Tasks<br />

Compare process risk against<br />

tolerable nsk<br />

Use decision guidelines to select<br />

required risk reduction<br />

Document selection process<br />

Copyright exida.com LLC 2001-2008<br />

48

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