Process Hazard Analysis (PHA)
The initial process hazard analysis and the five year revalidation, run with HAZOP, What If, Checklist, or whatever method fits the process
What this element is and why it matters
OSHA PSM at 1910.119(e) requires an initial process hazard analysis on each covered process and a revalidation at least once every five years. Acceptable methods include What If, Checklist, HAZOP, FMEA, Fault Tree Analysis, or another equally appropriate approach. The mandatory scope set out in (e)(3) covers the hazards of the process, any previous incidents, the engineering and administrative controls in place, the consequences of failure, facility siting, human factors, and a qualitative evaluation of the safety and health effects. Our team selects the right method for your process and runs the study with the discipline the rule expects.
Individual significance for organisations
This is the most leveraged process safety study your facility will conduct. A rigorous analysis catches hazard pathways before they ever turn into incidents, and it does so at a tiny fraction of the cost of fixing the same problem after startup. Facilities that run a disciplined programme with the right method, a genuinely multidisciplinary team, and proper action close out compound the benefit year after year, because the action register becomes a real engine for continuous improvement. We help your team build exactly that kind of programme.
Contribution to OSHA Process Safety Management (29 CFR 1910.119)
Paragraph (e) is the central analytical element of OSHA PSM. It converts the process safety information from (d) into ranked and defensible risk decisions that then drive operating procedures in (f), the scope of mechanical integrity in (j), the triggers for management of change in (l), and the scenarios for emergency planning in (n). Every other OSHA PSM element either feeds into the analysis, as process safety information and employee participation do, or receives from it, as procedures, mechanical integrity, management of change, incident investigation, and audit do.
What compliant execution looks like
How we implement this element
A focused six step methodology calibrated to deliver process hazard analysis (pha) as a working capability rather than a documented compliance artefact.
We match the method to the complexity of the process under (e)(2), choosing HAZOP for continuous operations, FMEA for batch and equipment focused work, and Fault Tree Analysis where a failure mode focus is needed.
We build a multidisciplinary team under (e)(4) that brings an operator, an engineer, and a process safety specialist together with study leadership and contractor representation where it applies.
We apply the full scope of (e)(3), covering hazards, previous incidents, controls, consequence, siting, human factors, and a qualitative safety and health evaluation.
We capture every recommendation with a risk ranking, an owner, and a target close out date under (e)(5) and tie it into management of change and corrective action.
We retain the records for the life of the process and beyond as (e)(7) requires and integrate them with your document system and process safety information.
We set the five year revalidation under (e)(6) with partial revalidation triggered by change and track expiry so no gap ever opens up.
Element implementation flow chart
A decision gated workflow that shows the actual sequence of activities from initiation through steady state operation, with key decision points highlighted.
What we produce
- A documented rationale for the method selected
- A study workbook with node by node scenarios
- An action register with risk ranking
- A documentation pack meeting the (e)(7) retention requirement
- A five year revalidation schedule
- An integration with management of change for partial revalidation
Where execution fails
- A method mismatched to the complexity of the process
- A team that lacks the operator perspective
- An action register that is filed while the actions themselves never close
- A revalidation that slips past the five year mark undetected
Codes this element is built on
Explore related elements in this framework
OSHA Process Safety Management (29 CFR 1910.119) full element index
Talk to us about implementing Process Hazard Analysis (PHA)
We can scope this element implementation against your facility, regulatory context, and existing management system maturity, then integrate it with the other OSHA Process Safety Management (29 CFR 1910.119) elements you already operate.