An effective management of change (MOC) process simply prevents accidents. In fact, several process industry incident investigations have identified a weakness in the MOC process as the root cause, including two case histories published in a 2001 safety bulletin issued by the United States Chemical Safety and Hazard Investigation Board (CSB). In addition to concluding that the proper application of MOC methodology could have prevented the incidents, the bulletin stressed the need for companies to adopt a systematic MOC process. Following the completion of initial process hazard analyses (PHAs), a systematic MOC process serves as the principal process safety management (PSM) system to ensure risk levels associated with process/plant modifications are addressed adequately. Further, operating companies that continue to incorporate MOC best practices and systems in their process are now able to achieve the “holy grail” of PSM – continuous PHA revalidation – that drives measurable cost reductions and safety benefits to the facility.
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