Safety Definitions
The Definition of Task Hazard Analysis (THA)
Task hazard analysis is the process of breaking a job into steps to identify hazards at each stage and determine controls.
Task hazard analysis is the process of breaking a job into steps to identify hazards at each stage and determine controls.
A systematic review method, similar to a Job Hazard Analysis (JHA), where a task is broken down into its individual steps so that potential hazards at each step can be identified and appropriate controls established before work begins.
Before replacing an overhead light fixture, a maintenance worker completes a THA identifying fall hazards from ladder use, electrical shock risk, and the need for a spotter, then applies the corresponding controls.
The terms are largely used interchangeably; some organizations use THA for one-off or non-routine tasks and JHA for established job roles, but both follow the same step-by-step hazard identification process.
A THA should be completed before starting any new, non-routine, or higher-risk task, and revisited whenever conditions, equipment, or personnel change.
Ideally, the workers who will actually perform the task participate in the analysis, since they have direct knowledge of the real conditions and potential hazards involved.
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