What is PSM? Process Safety Management Explained

PSM originated with the OSHA Process Safety Management standard (29 CFR 1910.119), which defined 14 management elements covering process safety information, hazard analysis, operating procedures, training, mechanical integrity, management of change, and incident investigation among others.

The Center for Chemical Process Safety (CCPS) later expanded this into the 20-element Risk-Based Process Safety (RBPS) framework, organised under four pillars: Commit to Process Safety, Understand Hazards and Risk, Manage Risk, and Learn from Experience.

Where one-time studies like HAZOP and QRA establish a point-in-time understanding of risk, PSM provides the ongoing management discipline — particularly management of change and mechanical integrity — that keeps that understanding valid as a facility evolves.

Major incident investigations consistently identify PSM management system gaps, not a lack of initial hazard studies, as root causes — making PSM maturity a leading indicator of process safety performance.