Job Hazard Analysis (JHA)

A job hazard analysis (JHA) is a technique that breaks a job into its individual steps, identifies the hazards in each step, and sets controls to eliminate or reduce them before anyone gets hurt. Also called a job safety analysis (JSA), a JHA turns a general risk into specific, task-level instructions workers can follow.

JHAs are one of the most practical tools in workplace safety. They are used to train new employees, write safe work procedures, investigate incidents, and prepare for non-routine or high-risk work.

What Is a Job Hazard Analysis (JHA)?

OSHA's publication Job Hazard Analysis (OSHA 3071) defines a JHA as "a technique that focuses on job tasks as a way to identify hazards before they occur." It looks at the relationship between the worker, the task, the tools, and the work environment. OSHA defines a hazard simply as "the potential for harm."

A completed JHA usually has three columns or sections for every step of the job:

• Job step: what the worker does, in the order it is done.
• Hazards: what could go wrong at that step and how someone could be hurt.
• Controls: what will be done to eliminate the hazard or reduce the risk.

The terms JHA and JSA are used interchangeably in most workplaces. Some organizations use "JSA" for a short pre-task review done in the field and "JHA" for a more formal, documented analysis, but there is no regulatory distinction.

Why a Job Hazard Analysis Matters

Many injuries happen during familiar tasks because hazards become invisible through routine. A JHA forces a structured second look. Done well, it helps you:

• Find hazards that general inspections miss, such as pinch points that appear only during a specific step.
• Choose effective controls instead of defaulting to "be careful."
• Create consistent training material and written procedures.
• Involve workers, who know the job best, in improving their own safety.
• Support investigations by showing how a job is supposed to be done.

JHAs also help meet regulatory expectations. For example, 29 CFR 1910.132(d) requires employers to assess the workplace for hazards that call for personal protective equipment and to certify that assessment in writing. A JHA often provides the task-level detail that supports it.

Which Jobs Should Get a JHA First?

Analyzing every job at once is rarely realistic. OSHA 3071 recommends giving priority to:

• Jobs with the highest injury or illness rates.
• Jobs with the potential to cause severe or disabling injuries or illness, even if there is no history of incidents.
• Jobs where one simple human error could lead to a severe accident or injury.
• Jobs that are new to your operation or have changed processes and procedures.
• Jobs complex enough to require written instructions.

Your incident records, near miss reports, and worker input are the best sources for building this priority list.

How to Conduct a Job Hazard Analysis Step by Step

1. Involve the workers. Include people who do the job. They know the shortcuts, workarounds, and problems that never make it into procedures.
2. Review history. Look at past injuries, illnesses, near misses, and equipment damage related to the job.
3. Fix urgent problems now. If you find an immediate danger during the preliminary review, correct it before finishing the analysis.
4. Select the job and define its boundaries. A job such as "change a conveyor belt" is a good size. "Maintenance" is too broad, and "pick up a wrench" is too narrow.
5. Break the job into steps. Watch the job being performed and list each step in order, usually 5 to 15 steps. Describe what is done, not how to do it safely yet.
6. Identify the hazards in each step. Ask what can go wrong, what the consequences would be, how it could happen, what else could contribute, and how likely it is.
7. Determine controls. For each hazard, choose controls using the hierarchy of controls, and name a person responsible for any change that needs to be made.
8. Review with workers and finalize. Confirm the steps and controls are accurate and workable, then use the JHA to train everyone who does the job.
9. Revisit regularly. Update the JHA after an incident, when equipment or methods change, or when workers raise concerns.

Choosing Controls in a JHA

OSHA 3071 notes that "not all hazard controls are equal." Controls should follow the hierarchy of controls:

• Elimination or substitution: remove the hazard or replace it with something less hazardous.
• Engineering controls: physically change the machine or environment, such as guards, ventilation, or lift assists. OSHA calls these the most effective controls in the JHA guide.
• Administrative controls: procedures, training, signage, job rotation, or permits.
• Personal protective equipment: gloves, eye protection, hearing protection, and respirators, used when other controls are not feasible or do not fully reduce the risk.

Most hazards that cannot be eliminated need a combination of these controls.

Job Hazard Analysis Example

Here is a simplified, hypothetical JHA for replacing a belt on a small conveyor:

Step 1: Shut down and isolate the conveyor

Hazard: unexpected start-up while hands are near the drive. Control: follow the written lockout procedure, apply personal locks, and verify zero energy by attempting a start.

Step 2: Remove guards and release belt tension

Hazard: stored spring energy in the take-up, cuts from guard edges. Control: release tension using the manufacturer's procedure and wear cut-resistant gloves.

Step 3: Remove the old belt and install the new one

Hazard: back strain from handling a heavy belt, pinch points at rollers. Control: use two people or a lifting aid and keep hands clear of roller nip points.

Step 4: Reinstall guards and restore power

Hazard: start-up with guards missing or people in the area. Control: confirm all guards are secured, clear the area, and remove locks only per procedure.

JHA vs. Risk Assessment

A JHA and a risk assessment are closely related but not identical:

• A JHA is task-focused. It follows one job step by step and produces practical controls for that job.
• A risk assessment is broader. It can cover an area, a process, equipment, or an entire site, and usually rates risk by likelihood and severity to prioritize action.

Many organizations add likelihood and severity ratings to their JHAs, combining both approaches in one form.

Common Mistakes to Avoid

• Writing it at a desk. A JHA built without observing the job usually misses real hazards.
• Vague controls. "Be careful" or "use caution" are not controls. Name the specific action, equipment, or procedure.
• Jumping to PPE. Consider elimination and engineering controls before relying on protective equipment.
• Filing and forgetting. A JHA that is never used for training or never updated after changes loses its value.
• Too many or too few steps. Overly detailed JHAs are not read, and overly broad ones hide hazards.

How SMS360 Helps

A JHA is only useful if it is current, easy to find, and its actions get done. The SMS360 Risk Assessment module gives teams a consistent way to document job steps, hazards, risk ratings, and controls, and to assign follow-up actions to responsible people with due dates and reminders. Assessments are stored as searchable records, can be completed on mobile devices in the field, and can be reviewed and updated when jobs change.

Frequently Asked Questions

Is a job hazard analysis required by OSHA?

There is no general OSHA standard that requires a JHA for every job. However, OSHA recommends JHAs, and several standards require related hazard assessments, such as the written PPE hazard assessment under 29 CFR 1910.132(d). A JHA is also a common way to support compliance with other standards and is often required by clients, contracts, or company policy.

What is the difference between a JHA and a JSA?

In most workplaces, there is no meaningful difference. Job hazard analysis and job safety analysis both describe breaking a job into steps, identifying hazards, and setting controls. Some companies use JSA for a quick field review before work starts and JHA for a formal written analysis, but that is internal convention, not a regulatory definition.

Who should be involved in a job hazard analysis?

Include the workers who perform the job, their supervisor, and someone with safety knowledge. Workers provide practical insight into how the job is really done, supervisors can approve changes, and safety staff help identify less obvious hazards and appropriate controls. For complex equipment, include maintenance or engineering staff as well.

How often should a JHA be reviewed?

Review a JHA whenever the job changes, after an incident or near miss involving that job, when new equipment or materials are introduced, and when workers report a problem. Many organizations also set a periodic review cycle, such as annually, to confirm the steps and controls still match how the work is actually done. Share updates through briefings like a toolbox talk.