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# 50 company hazop team process drawing date section

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Company: HAZOP Team: Process: Drawing # Date: Section: Operation Mode: Page: of Study Node Process Parameter Guide Word Possible Causes Possible Consequences Risk Safeguards Recommendations responsibility reply date Status S L RR Possible Consequence The result of the deviation , if it occurs. Consequences may be as simple as a decrease in quality, or as complicated as an influence on process control. There are often multiple consequences to one deviation. 51
Company: HAZOP Team: Process: Drawing # Date: Section: Operation Mode: Page: of Study Node Process Parameter Guide Word Possible Causes Possible Consequences Risk Safeguards Recommendations responsibility reply date Status S L RR Risk Matrix A risk ranking scheme that allows for prioritization. It forms a relative weighting of hazards based upon: S=Severity - usually a number from 1-4 based upon magnitude of catastrophe of the deviation. L=Likelihood - usually a number from 1-4, based upon perceived probability and/or recorded data supporting the probability of the deviation RR=Relative Risk the multiple result of S x L, used for relative ranking at the end of the HAZOP process. 52

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Number of Consequences by Severity and Likelihood (Risk Matrix) Risk Matrix example: 53
HAZOP Criticality analysis 54

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HAZOP Criticality analysis 55
Categories Probability P Cond. Probabil B Severity S Very rare 1 Very low 1 Low 1 Rare 2 Low 2 Significant 2 Likely 3 Significant 3 High 3 Frequent 4 high 4 Very high 4 56

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Interpretation of the values 57