Job hazard analysis, step by step

What a JHA is — and when it is required

A job hazard analysis (also job safety analysis, JSA, or task hazard analysis) decomposes a specific job into ordered steps, identifies the hazards each step can produce, and assigns a control to each hazard. OSHA publishes the canonical method in its Job Hazard Analysis booklet (OSHA 3071).

A JHA is a method for identifying hazards and selecting controls; it can support, but does not automatically satisfy, each standard's specific requirements. For example, 29 CFR 1910.132(d)(2) requires written certification of a workplace PPE hazard assessment. For covered servicing and maintenance, 29 CFR 1910.147 generally requires documented energy-control procedures, subject to the limited documentation exception in paragraph (c)(4)(i) only when all eight conditions are satisfied.

The four-step method

OSHA 3071 reduces the craft to four moves:

• Select the jobs that earn analysis first: highest injury history, highest severity potential, new or changed tasks, and jobs new crews inherit.
• Break the job into 5–10 observable steps by watching a competent worker perform it — not by writing the procedure from a desk.
• Identify hazards per step, asking what can go wrong, what the consequence is, and what conditions (equipment, environment, pressure) contribute.
• Assign controls per hazard using the hierarchy: eliminate, substitute, engineer, then administrative controls and PPE last — and name who implements each.

The failure modes

JHAs fail in predictable ways: written once and never revisited while the task changes; written generically for a category of work instead of the actual job; controls that quietly default to "wear PPE" for hazards an engineering fix would remove; and analyses stored where field crews never see them. A JHA the crew has not reviewed at the pre-task talk is shelf-ware.

The fix is treating the JHA as a living site document: reviewed at task kickoff, revised when the incident or near miss shows it wrong, and versioned so the current one is unambiguous.

Frequently asked questions