Glossary

What is a JSA (Job Safety Analysis)?

A job safety analysis breaks a specific job into its sequential steps, identifies what could cause harm at each step, and assigns a control to prevent it. It is also known as a job hazard analysis (JHA), and the idea is the same: looking at a task as a sequence of steps rather than as a single block.

Glossary Published September 15, 2026 3 min read

01The difference

How it differs from a risk assessment

A risk assessment looks at an activity, an area or a process in general terms. A job safety analysis goes down to one specific task and walks through it step by step. A risk assessment answers: what are the risks of maintenance work in this section? A JSA answers: what could happen at step three of dismantling this pump?

The two are therefore used together rather than as alternatives: the assessment sets the broad picture and the priorities, while the analysis governs actual execution on the ground — particularly for non-routine tasks not covered by an existing written procedure.

02The process

How it is carried out — four steps

Select the task

Non-routine tasks, tasks with a history of incidents, or tasks being done this way for the first time.
Break it into steps

Realistic sequential steps — neither over-detailed into twenty, nor compressed into three.
Identify the hazard at each step

What could cause harm at this specific step, and to whom.
Assign a control to each hazard

Following the correct hierarchy, ending at personal protective equipment rather than starting there.

The condition that spoils a JSA when ignored: writing it at a desk. An analysis written by someone who has never performed the task describes the theoretical method and misses the steps the person actually adds in the field — which are usually where the real hazard sits.

03Worked example

A short example — replacing a pump

Step	Hazard	Control
Isolate the pump electrically	Unexpected start-up while working	Lockout tagout procedure and zero-energy verification
Drain the line	Sudden release of pressurised fluid	Bleed pressure before disconnecting, and check the gauge
Disconnect the fittings	Spillage and material on the skin	Drip tray and gloves matched to the material
Lift the pump	Load falling on the foot	Suitable lifting equipment and clearing the lift zone
Reinstall and test	Start-up before isolation is fully restored	Restart only after isolation is removed in a documented order

04In a Saudi context

In a Saudi context

On sites where contractors carry out non-routine work inside narrow time windows, a JSA sometimes becomes a form signed minutes before starting without being read. The difference between a site that benefits from it and one that holds it nominally shows in a single question: did the person who will actually perform the task take part in writing it?

06The product connection

How this relates to SquintPRO

The permanent gap in a job safety analysis is the difference between the written method and the performed one. Event search in the platform lets the team review how a similar task was actually carried out on site — which steps were added, where the deviation happened — so the next analysis is built on observed practice rather than assumed description. Read about the platform.

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