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Process Hazard <br />K1304•] <br />question, scenario, possible consequences/hazards, and engineering and <br />administrative controls for a specific item, the team would rank the risk. The <br />process being studied is partitioned into sections to make the study more <br />manageable and focus the study team. <br />A risk -ranking scheme was used for three reasons: <br />• To evaluate the risk of each hypothesized scenario <br />• To assess whether additional safeguards are required for scenarios with <br />unacceptable levels of risk <br />• To allow a means to prioritize recommended actions <br />Ranking the risk was a simple process: <br />1. Compare the scenario, consequences, and hazards for an item against the four - <br />tiered qualitative consequence ("C") range provided with the matrix and select <br />number, 1 to 4, which matches most closely the consequence / severity for that <br />scenario. Note that engineering and administrative controls were not considered <br />when assigning a consequences value, i.e., the consequence value was selected <br />under the assumption that engineering and administrative controls fail. <br />2. Compare the scenario, the consequences, hazards and the engineering and <br />administrative controls for an item against the four -tiered qualitative frequency <br />("F") range provided with the matrix and select a number, 1 to 4, that matches <br />most closely the likelihood for that scenario. <br />3. Use the consequence value and the frequency value to document the risk ranking <br />("RR"), A to D, using the matrix. <br />The purposes of the recommendations are: <br />• To reduce the probability of occurrence of an incident <br />• To reduce the severity of the consequences, in the event the incident were <br />to occur; <br />• Request an update or addition of a document; or <br />• To request further information, when the scenario could not be fully <br />described owing to a lack of data. <br />15 <br />