Integrated Hazards Analysis: Using the Strengths of Multiple Methods to Maximize Effectiveness

摘要

Hazard analysis techniques take on many forms, with some being uniquely developed to assess specific systems, processes, or scenarios. There are also a number of well-known methods that are used on a wide variety of systems, such as What-if/Checklist Analysis, Hazard and Operability Analysis (HazOp), and Failure Modes and Effects Analysis (FMEA). Unfortunately, these generalized methods tend to work well on only a part of the risk assessment spectrum, such as failure mode identification, causal factor determination, or risk prioritization, with few of them effectively addressing all aspects of risk evaluation. In this paper, we discuss a hybrid methodology that utilizes the strengths of HazOp and FMEA for failure mode identification and risk prioritization, and Layers of Protection Analysis for evaluation and application of effective controls. As part of the hybridized methodology development, a completely new risk prioritization chart was prepared that allows consideration of risks to the environment, people and business, from both engineered processes and personnel operations.