The good news about the Process Safety Management (PSM) standard is that it is a performance-based standard. The bad news about PSM, well, is that it is a performance-based standard. While it provides the operator some flexibility on complying, it can often lead to being second-guessed by an agency. Not only does the operator have to comply with the regulations, the operator must  comply with and document compliance with relevant codes and standards or Recognized and Generally Accepted Good Engineering Practices (RAGAGEP). These include widely adopted codes such as the National Fire Protection Association (NFPA), consensus documents such as the American Society of Mechanical Engineers (ASME), non-consensus documents such as the Chlorine Institute (CI) and in most cases Internal Standards.
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