Home › PSM Elements › Process Hazard Analysis
29 CFR 1910.119(e)

Element 3: Process Hazard Analysis

A systematic study of your process hazards — what can go wrong, how bad, and what's in place to prevent it.

$4,000-$156,259
Penalty Range
Most Common
Citation Frequency
#1 Most Cited
PSM Ranking
Element Overview

What Is Process Hazard Analysis Under PSM?

Process Hazard Analysis is the analytical core of PSM. A PHA is a systematic, organized effort to identify and analyze the significance of potential hazards associated with the processing or handling of highly hazardous chemicals. OSHA requires that PHAs be performed using one or more of the recognized methodologies: What-If, Checklist, What-If/Checklist, HAZOP, Failure Mode and Effect Analysis, Fault Tree Analysis, or an appropriate equivalent methodology.

PHAs are not a one-and-done exercise. OSHA requires that initial PHAs be updated and revalidated on a schedule not to exceed five years. Each revalidation must reflect changes made to the process since the last PHA. All recommendations from a PHA must be resolved in a timely manner and documented — including the rationale when a recommendation is rejected.

The PHA must be performed by a team with expertise in engineering and process operations, and at least one team member must be knowledgeable in the specific PHA methodology used. Critically, workers who currently operate the process being analyzed must be part of the team.

Regulatory Text

What the Standard Actually Requires

The employer shall perform an initial process hazard analysis on processes covered by this standard. The process hazard analysis shall be conducted by a team with expertise in engineering and process operations, and the team shall include at least one employee who has experience and knowledge specific to the process being evaluated. Also, one member of the team must be knowledgeable in the specific process hazard analysis methodology being used.— 29 CFR 1910.119(e)(1), (e)(4)
  • 1
    Appropriate Methodology — PHA must use a recognized methodology: What-If, Checklist, HAZOP, FMEA, Fault Tree, or equivalent.
  • 2
    Address Specific Topics — PHA must address: hazards, previous incidents, engineering and administrative controls, consequence of control failure, facility siting, human factors, qualitative range of failure effects.
  • 3
    Qualified Team — Team must include engineering expertise, process-specific experience, and at least one currently operating process operator.
  • 4
    Five-Year Revalidation — PHAs must be updated and revalidated at least every five years from the initial date or last revalidation.
  • 5
    Recommendation Tracking — All recommendations must be documented with resolution and rationale. Rejected recommendations require documented justification.
  • 6
    Retained Documentation — PHA findings, recommendations, and resolutions must be retained for the life of the process.
Compliance Failures

Common Violations OSHA Cites

These are the deficiencies inspectors most frequently document in Process Hazard Analysis programs. Each can represent a separate citation.

Frequently Cited Violations

  • PHA not revalidated within five years of previous PHA or revalidation
  • PHA team did not include a currently operating process operator
  • PHA recommendations not resolved — open recommendations with no documented action
  • PHA did not address facility siting or human factors
  • Changes to the process not reflected in the PHA since last revalidation

What Inspectors Look For

  • Verifying the PHA revalidation schedule — date of last PHA vs. five-year requirement
  • Reviewing PHA team rosters for operator representation and methodology expertise
  • Pulling the open recommendation tracking log and checking resolution status
  • Asking operators whether changes made since last revalidation were captured
Real-World Impact

Consequences of Process Hazard Analysis Failures

PHA deficiencies are directly linked to major incidents. The Texas City explosion (2005, 15 killed) involved a process with a PHA that failed to adequately identify the hazards of the blowdown drum. Inadequate PHAs consistently appear in CSB investigation reports because unidentified hazards cannot be controlled.

Penalty Exposure — Process Hazard Analysis

OSHA penalty range for Process Hazard Analysis violations: $4,000-$156,259 per violation. PHA is typically the most-cited PSM element in major inspections. Penalties for missed revalidations or failure to resolve recommendations are frequently classified as willful. Per-violation penalties can reach $156,259 for egregious willful violations.

Documentation Requirements

Documents Your PHA Program Needs

An OSHA compliance inspection for Process Hazard Analysis will typically request the following. Gaps in any of these areas may result in citations.

Required Documentation

  • Initial PHA documentation
  • PHA revalidation schedule and completed revalidation packages
  • Open and closed recommendation tracking log with resolutions
  • PHA team qualification records
  • Facility siting study
  • Human factors review documentation
OSHA Letter of Interpretation

Related LOI Guidance

OSHA has clarified these specific questions about the Process Hazard Analysis element through official Letters of Interpretation:

What PHA Methodology Is Required? Who Must Be on the PHA Team? When Does the 5-Year Revalidation Clock Start? How Must PHA Recommendations Be Resolved? Must Previous Incidents Be Included in the PHA? Is Consequence Analysis Required in the PHA?

Get Process Hazard Analysis Documents — Ready to Use

SafeGuard PSM provides OSHA-aligned Process Hazard Analysis procedures, templates, and checklists that you can implement today. Written by PSM professionals. Formatted for actual field use.

Browse the Document Library →