SWMS vs JSA: what is the difference?
A SWMS is a legal document required before high risk construction work, covering the HRCW, hazards, controls and how they are checked. A JSA (job safety analysis) is a general tool that breaks one task into steps; no WHS regulation requires it.
The short version
If the work is high risk construction work, you need a SWMS. Nothing else replaces that duty unless it contains everything a SWMS must contain. A JSA is optional unless your company or the site requires it, and it is often used for tasks that are not HRCW.
WorkSafe WA puts the difference this way: a SWMS is generally different from documents that focus on specific tasks or processes, such as a job safety analysis or a safe operating procedure. A SWMS is not meant to be a procedure. It is a tool to help the business and workers confirm and monitor the controls needed at the workplace.
What a SWMS is
A SWMS is required by r.299 of the WHS Regulations before any of the 18 categories of HRCW listed in r.291 starts (19 in Victoria). It must identify the HRCW, state the hazards and risks, describe the controls, and describe how the controls will be implemented, monitored and reviewed. It must take account of the site and, on a construction project, the principal contractor's WHS management plan, and it must be easy for the workers to understand.
The law also says what happens after it is written. Work must follow it, and stop if it does not (r.300). A copy goes to the principal contractor before the work starts on a construction project (r.301). It is reviewed when controls change (r.302) and kept until the work is finished, or 2 years after a notifiable incident (r.303).
What a JSA is
A JSA takes one task, lists its steps in order, and records the hazards and controls at each step. It is a planning and briefing tool. The WHS Regulations do not require a document called a JSA, so its format, review and retention are set by your company or the site. Some sites call it a JSEA (job safety and environmental analysis) and add environmental hazards.
Because a JSA is task focused, it is often more detailed than a SWMS for one activity. That can make it useful for training or for unusual tasks. It can also make it long, and WorkSafe WA warns that a lengthy, overly detailed SWMS is hard to understand, apply and monitor. The same applies to any document you expect a crew to read on site.
A typical JSA form has columns for the job step, the hazards, the controls and the person responsible, with the crew signing at the bottom. Many businesses use a JSA for routine tasks that are not HRCW, such as fitting out at ground level, and a SWMS for the HRCW parts of the same job.
Side by side
The table compares the two documents and where a general risk assessment fits.
| SWMS | JSA | Risk assessment | |
|---|---|---|---|
| Legal basis | WHS Regulations r.299 to r.303 (Vic: OHS Regulations 2017) | None specific; company or site rule | Mandatory for some activities; otherwise a tool for managing risk |
| When | Before any HRCW starts | Before a task the company or site says needs one | When there is uncertainty about a hazard or how to control it |
| Focus | The HRCW at this workplace and how controls are monitored | The steps of one task | How likely and how severe harm could be |
| Must contain | HRCW, hazards and risks, controls, how controls are implemented, monitored and reviewed | Whatever the form requires, usually steps, hazards, controls | Hazards, likelihood, consequence, controls |
| Give to principal contractor | Yes, on a construction project (r.301) | If the site asks | If the site asks |
| Keep for | Until the HRCW is finished; 2 years after a notifiable incident | Company policy | Company policy unless a regulation says otherwise |
Which one do you need?
Work it out from the job, not the paperwork habit.
- Re-roofing a two storey house: falls over 2 m make it HRCW, so a SWMS is required. A JSA is optional.
- Replacing a bathroom vanity at ground level with no HRCW: no SWMS is required. A JSA or simple risk assessment is a good way to manage the risks if the site wants one.
- Trenching 2 m deep next to a road with an excavator moving: three HRCW categories apply. One SWMS can cover all of them.
- The principal contractor asks for a SWMS and a JSA: give both, but make sure they say the same thing about controls.
Can a JSA be used as a SWMS?
Only if it does everything a SWMS must do. WorkSafe WA notes that documents prepared for other safe work systems may meet SWMS requirements if they are prepared and used for HRCW in the same way as a SWMS, giving asbestos management plans as an example. In Victoria, an asbestos control plan is taken to be a SWMS.
In practice, a JSA usually misses two things: it does not identify the HRCW, and it does not say how the controls will be monitored and reviewed. Add those, and give it to the principal contractor, and it can do the job. Calling it a SWMS on the cover does not.
Common mistakes
These mix-ups cause most rejected paperwork.
- Handing a principal contractor a JSA for HRCW and assuming it counts as a SWMS.
- Writing a SWMS like a procedure manual, with every step in detail, so it is too long for the crew to use.
- Two documents with different controls for the same hazard.
- Reusing a generic SWMS or JSA without reviewing it for the site.
- Forgetting to update the SWMS when the JSA for the day shows something has changed.