Job Safety Analysis (JSA) — The Method, Explained Properly

A job safety analysis takes one task and breaks it into the sequence of steps a worker will actually perform. For each step, it asks three questions: what could go wrong here, how badly, and what will we do about it before the step starts. The output is a table — step, hazards, risk rating, controls, residual risk — that the crew reviews and signs before work begins.

The power of the method is its granularity. A risk assessment of "replace the pump motor" produces generalities. The same task broken into isolation, draining, unbolting, rigging, lifting, setting, reconnection and testing produces specific hazards at specific moments — and controls that name what happens, when, and who is responsible.

Across Australian industry the same tool travels under several names — JSA, JHA (job hazard analysis) and JSEA (job safety and environmental analysis, which adds an environmental column). The method is identical: steps, hazards, controls, sign-on.

A JSA is a general risk-management tool under the duty of care in your state's WHS or OHS Act. It is not, on its own, a legislated document — no regulator prescribes its format, and no law requires one by name.

That changes the moment the task is high-risk construction work. Regulation 291 of the model WHS Regulations (adopted in every state and territory except Victoria, which covers the same ground in regulations 322 to 327 of the OHS Regulations 2017) defines the classes of HRCW — work at height over 2 metres, excavation deeper than 1.5 metres, work on or near energised electrical services, confined spaces and the rest. For that work, a Safe Work Method Statement is mandatory before work starts, and a JSA does not discharge the duty. The honest position: JSA for task-level analysis, SWMS where the law requires it, and on many construction sites, both — the SWMS for the HRCW, JSAs for the everyday tasks around it.

For the full comparison, see SWMS vs JSA. To check whether your work triggers the SWMS duty, see When is a SWMS Required?.

1. Pick the task and the crew. One JSA covers one task. The people who do the work belong in the room — the analysis is only as good as the experience feeding it.

2. Break the task into steps. Walk it in work order, from arrival to clean-up. Most tasks resolve into six to ten steps; fewer usually means steps are hiding, more usually means two tasks are being analysed at once.

3. Identify hazards at each step. Be concrete. "Saw kickback striking the thigh" leads to a control; "injury" leads nowhere. Look for the energy in the step — gravity, electricity, pressure, momentum, chemistry — and where a person meets it.

4. Rate the risk before controls. A simple High / Medium / Low scale is enough at task level. The rating's job is to force priority, not to fake precision.

5. Choose controls down the hierarchy. Eliminate or substitute first, isolate or engineer next, and only then rely on procedure and PPE. Tag each control with its level — it exposes an analysis leaning entirely on "be careful" and gloves.

6. Rate the residual risk. If a step still sits at High with controls applied, the method is telling you to change the method, not to proceed.

7. Brief and sign on. Every worker on the task reviews the analysis, raises what it missed, and signs. An unsigned JSA is a document; a signed one is a briefing that happened.

8. Stop and revise when conditions change. Weather, a new trade alongside, different plant, an unexpected service — any of them reopens the analysis before work resumes.

A completed analysis for a real task reads like a story of the work. Take replacing a fluorescent fitting: isolate and tag the circuit (hazard: stored energy, contact with adjacent live parts — controls: prove de-energised, barricade below); position the platform ladder (hazard: fall from height, unstable footing — controls: platform ladder over stepladder, three points of contact); remove the diffuser and tubes (hazard: broken glass, dropped objects — controls: exclusion zone, catch sheet); fit and test (hazard: re-energisation sequence — controls: one nominated person controls the isolation).

Every row names a moment in the work, and every control names an action someone can be seen doing. That is the standard a regulator's inspector, a principal contractor's safety adviser, or a court applies when they ask whether the analysis was genuine or ceremonial.

For full worked examples across several trades, see JSA Examples.

Our Job Safety Analysis template is a completed worked analysis in editable Word format — not a blank grid. It carries a full task broken into steps with hazards, before-and-after risk ratings, hierarchy-tagged controls, PPE, training and licensing prompts, emergency response, review triggers and a worker sign-on register. A state-specific legal context section covers every Australian jurisdiction, including the Victorian OHS framework.

Trade-specific versions carry the steps and hazards of the trade already analysed: Electrical, Confined Space Entry, Plumbing, Concreting, Crane & Lifting, Forklift, Working at Heights, Asbestos Removal, Welding & Hot Work, Carpentry and Excavation.

Every template is a one-off purchase at $99, inclusive of GST — no subscription, nothing to renew — and each purchase covers all eight states and territories.

The purpose of a job safety analysis is to make a crew think about a specific task before doing it, at the level of detail where hazards actually live — the step, not the job title. It converts experience into documented controls, gives new workers the benefit of the crew's scar tissue, creates evidence that consultation happened, and gives everyone on the task a shared, signed understanding of what could go wrong and what stands between them and it. A JSA that is written in the office and signed unread achieves none of this — the method works exactly as hard as the conversation behind it.