7.1. Procedure

A job step is defined as a segment of the operation necessary to advance the job. When breaking down the job into basic steps care must be taken not to make the steps too general as controls may be overlooked, or missing details may lead to missing some hazards. At the same time there must not be too many steps.

If the job is complex, steps may be combined where suitable. Ensure that the steps are in the correct sequence. Any step that is out of order may miss serious potential hazards or introduce new hazards. Each step should be started with a verb (such as 'do', 'remove', 'open' or 'fix').

Each step is to be written on the JSA form in the respective column.

The figure below illustrates the basic steps of developing a JSA.

When a JSA is being used to assess a job or task involving equipments such as machinery or plant and interconnected mechanical items (such as hydraulics, gears, pulleys, levers, motors, gearboxes etc.) careful consideration must be given to potential secondary knock-on effects of actions outlined in the JSA.

Serious accidents have occurred where a seemingly safe act such as disconnection of a chain, in combination with a creeping hydraulic cylinder has resulted in creating a secondary hazardous condition of that chain falling onto people while carrying out the task. For technically complex situations, the task should be assessed using a risk assessment tool other than a JSA.

Similar cascading effects have also been reported when there is fire leading to secondary fire in the associated systems or substances.

In general the following three steps to conduct a Job Safety Analysis (JSA), are considered:

  1. Break the job down into its basic steps;
  2. Identify the hazards that are present in each of the steps; and
  3. Develop controls for all hazards that you have identified.

The following table helps in understanding the three steps:


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