Process hazard analysis screening methods

Procedural controls, process controls, 98-99 Process controls, 96-100 active controls, 98 inherently safer approach, 97 mitigation techniques, 99 passive controls, 97-98 procedural controls, 98-99 safe operating limits, 99-100 Process definition, documentation, 102-104 Process design, documentation, 105 Process hazard analysis (PHA) risk assessment, 92-93 screening methods, 63 Process risk management decisions, documentation, 105-106... 

The first step, the preparatory phase, integrates the task framing and definitions (step 1.1) into the process of familiarization with the system. It is also important to decide on the spectrum of hazards and threats to be included into the analysis. Furthermore, it is necessary to deeply understand failure models and effects on each of the components of the CL For a more effective screening of the system vulnerability some reasonable simplifications should be made. These assumptions need re-visiting in a later phase of the assessment (step 3.2). After key information is collected and preassessment is done, the knowledge base should be checked with respect to the availability of methods suitable for the defined tasks. 

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