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A job hazard analysis breaks a task into its individual steps, identifies the hazards present at each step, and specifies the controls that eliminate or reduce the risk. It is a core safety practice that supports employee training, written work procedures, and OSHA compliance efforts.
The method is simple and disciplined. Select the job, prioritizing tasks with injury history, high severity potential, new or changed processes, and complex procedures. Observe the work being performed and list the steps in order, keeping them at a level of detail a new employee could follow. For each step, ask what can go wrong, what the consequences would be, and what conditions or actions could cause it. Then assign controls using the hierarchy of controls: elimination first, then substitution, engineering controls, administrative controls and safe work procedures, and the personal protective equipment assessment last.
Involve the people who do the work. Employees know the workarounds and the near misses that never made it into a report, so pair the analysis with real near miss reporting, and remember they will not follow controls they had no part in choosing. Document the analysis in a simple three-column format, and use it as the basis for the task's written procedure and training checklist.
A JHA that sits in a binder has no value. Review it after any injury or near miss involving the task, whenever equipment or materials change, and on a set cycle. The most common shortcoming is naming personal protective equipment as the control for every hazard, which OSHA's PPE standards treat as inadequate where feasible engineering or administrative controls exist.
Start with tasks that have an injury or near miss history, tasks where a mistake could cause severe harm, new or recently changed processes, and procedures complex enough that people improvise. Working through that list first puts the effort where the risk is, rather than analyzing every task in the operation at once.
The employees who actually perform the task, along with the supervisor and whoever owns safety for the area. Frontline workers know the shortcuts, the awkward steps, and the near misses that never got reported. They are also far more likely to follow controls they helped select rather than ones handed to them.
After any injury or near miss involving that task, whenever equipment, materials, or the process changes, and on a set periodic cycle so nothing goes stale. A JHA written once and filed away stops matching the work quickly, and an inaccurate analysis is worse than none because it creates false confidence.