What Is a Job Hazard Analysis (JHA) and How Do You Conduct One?

A workplace hazard can be easy to recognize after an incident.

The harder and more valuable task is identifying it before anyone gets hurt.

A Job Hazard Analysis, commonly called a JHA, helps employers do exactly that by breaking a job into individual steps, identifying what could go wrong during each step, and determining how those hazards should be controlled before work begins.

Instead of relying on broad instructions such as “work safely” or “wear PPE,” a JHA connects the actual task with the actual exposure.

For employers, supervisors, and workers, that makes the JHA one of the most practical tools for turning workplace safety requirements into clear actions that can be used at the point of work.

What Is a Job Hazard Analysis?

A Job Hazard Analysis is a task-specific review of how work is performed, what hazards may be present, and what controls are needed to reduce the risk.

The analysis typically follows a simple sequence:

What is the worker doing?

What could go wrong?

Who could be affected?

How serious could the outcome be?

What should be done to prevent or control the exposure?

The value of a JHA comes from its specificity.

A general statement such as “perform pump maintenance” does not reveal much about the hazards involved.

Breaking the job into steps such as isolating energy, opening a line, removing components, and testing operation makes the exposure much easier to evaluate.

Each step may introduce different hazards, including pressure, chemical contact, hot surfaces, moving equipment, stored energy, or unexpected atmospheric conditions.

JHA vs. JSA: Is There a Difference?

Job Hazard Analysis and Job Safety Analysis, or JSA, are often used interchangeably.

Different organizations may prefer one term, but the basic approach is generally the same: break the job into steps, identify hazards associated with those steps, and establish safe controls before work begins.

OSHA also uses both terms in its safety resources.

The important issue is not the title of the form.

It is whether the analysis accurately describes the work and gives employees useful controls they can follow.

Why Conduct a JHA?

A JHA helps employers identify hazards before those hazards become incidents.

OSHA describes hazard identification as a proactive and ongoing part of an effective safety and health program. Employers are encouraged to review workplace information, investigate injuries and near misses, consider nonroutine work, and evaluate both likelihood and severity when prioritizing hazards.

A well-developed JHA can support that process by focusing attention on the point where hazards actually occur: during the task.

JHAs Can Reveal Hidden Exposure

Routine jobs sometimes receive less scrutiny because employees have performed them for years.

Familiarity can make hazards easier to overlook.

A worker may step over the same hose every day, work beside the same forklift route, or open the same pressurized line without incident.

The absence of an injury does not mean the hazard is controlled.

Breaking the work into steps can make these routine exposures more visible.

JHAs Improve Communication

A JHA creates a shared understanding between workers, supervisors, maintenance personnel, contractors, and safety staff.

Everyone can review the same sequence of work and discuss the same hazards before the task begins.

This is especially useful where several departments interact or where conditions change between shifts or locations.

Hazard vs. Risk

A useful JHA distinguishes between a hazard and risk.

A hazard is something that has the potential to cause harm.

Examples include:

A sharp edge, chemical, forklift, energized conductor, hot surface, elevated platform, or pressurized line.

Risk describes how likely that hazard is to cause harm and how serious the consequences could be.

For example, a forklift is a hazard whether it is moving or parked.

The risk becomes much higher when the forklift operates continuously through a shared pedestrian aisle with limited visibility.

This distinction helps the JHA move beyond simply listing objects or conditions.

Instead of writing “forklift,” a useful entry might say:

Pedestrian could be struck by a forklift while crossing the loading area.

That description makes the exposure clear and gives the team something specific to control.

Step 6: Identify Hazards for Each Step

For every job step, ask what could cause injury or illness.

Do not look only at the worker’s immediate action.

Consider equipment, materials, surrounding activities, environmental conditions, and other people who may enter the area.

Look for Moving Equipment and Caught-Between Hazards

Machinery, vehicles, tools, suspended loads, and moving components can expose workers to:

Crushing, pinching, entanglement, or struck-by hazards.

Pay particular attention to:

Forklift routes, loading areas, blind corners, rotating equipment, conveyors, and suspended materials.

A worker performing maintenance may also be exposed to nearby operations even when the equipment they are repairing has been shut down.

Look for Stored Energy

Hazardous energy is not limited to electricity.

A JHA should consider:

Electrical, hydraulic, pneumatic, mechanical, gravitational, thermal, and pressure energy.

A pressurized hose can move violently when disconnected.

A raised component can fall.

A spring can release tension.

Hot material can remain hazardous after equipment is shut down.

The JHA should identify where isolation, blocking, depressurization, or verification needs to occur.

Look for Falls and Access Hazards

Ask whether workers need to climb, reach, work from ladders, use platforms, or work near openings.

Consider both the elevated work and how employees reach the work area.

A task may also introduce a slip or trip hazard if workers carry tools, hoses, or materials across uneven ground.

Weather, lighting, and restricted access can increase the risk.

Look for Chemical Exposure

Review chemicals used during the task.

Potential routes of exposure may include:

Splash, skin contact, inhalation, vapor, fumes, dust, or accidental release.

The JHA should describe the event clearly.

Instead of:

Chemical hazard

write:

Worker may receive a corrosive splash while disconnecting the transfer line.

That description supports a much more specific control.

Look for Atmospheric Hazards

Certain jobs may involve changing atmospheric conditions.

Examples include:

Tank entry, confined spaces, process maintenance, chemical handling, or operations involving gases or vapors.

Possible hazards may include:

Toxic contaminants, oxygen deficiency, flammable atmospheres, or airborne particulates.

Atmospheric hazards may require testing, ventilation, respiratory protection, restricted entry, or other controls depending on the work.

Look for Heat and Noise

Heat exposure can come from:

Hot surfaces, steam, furnaces, welding, radiant heat, outdoor work, or heavy protective clothing.

Noise exposure may come from:

Grinding, machinery, impact tools, compressors, or production equipment.

These hazards may not produce an immediate visible injury, but they still belong in the analysis.

Consider Ergonomic Hazards

Physical strain can also be part of a JHA.

Look for:

Heavy lifting, pushing, pulling, twisting, repeated reaching, awkward postures, repetitive motion, or excessive grip force.

A task may involve both acute and ergonomic hazards.

For example, lifting a heavy valve may create both a crush hazard and a back-strain risk.

Consider Nearby Workers

The employee performing the task may not be the only person at risk.

Include:

Pedestrians, operators, contractors, maintenance personnel, drivers, visitors, and workers in adjacent areas.

Grinding may create sparks or debris that affects someone nearby.

Chemical transfer may expose employees passing through the area.

A vehicle maneuver may put pedestrians at risk even though they are not involved in the task.

Step 7: Describe What Could Go Wrong

Avoid vague hazard labels.

Write the event as a realistic scenario.

Instead of:

Fall hazard

write:

Worker could lose balance while climbing the ladder with tools and fall to the lower level.

Instead of:

Moving equipment

write:

Pedestrian could be struck by a forklift entering the shared aisle from a blind corner.

This format makes it easier to identify an effective control.

Step 8: Evaluate Likelihood and Severity

Once hazards have been identified, prioritize them.

A simple risk-rating system can consider two factors:

Likelihood: How likely is the event to occur?

Severity: How serious could the outcome be?

The organization may use a numerical matrix, descriptive categories, or another consistent method.

The exact format matters less than applying it consistently.

Record the Reason for the Rating

Do not write only a score.

Explain why the hazard received that rating.

For example:

Likelihood high because the task occurs five times per shift and employees work within the active forklift aisle.

Severity high because contact with the vehicle could result in serious injury or fatality.

This explanation helps supervisors understand why one finding receives priority over another.

Step 9: Choose Controls Using the Hierarchy of Controls

After identifying the risk, decide how to reduce it.

The strongest approach is to use the hierarchy of controls.

Start by asking whether the hazard can be removed completely.

If not, consider whether it can be substituted, isolated, engineered out, managed through work practices, or addressed with PPE.

Eliminate the Hazard Where Possible

Elimination removes the exposure.

For example:

A maintenance task performed at height may be redesigned so components can be serviced from ground level.

Vehicle traffic may be removed from a work zone during maintenance.

A hazardous material may no longer be needed.

Elimination is powerful because it does not depend on workers remembering to follow a rule every time.

Substitute a Safer Option

If the hazard cannot be eliminated, determine whether something less hazardous can be used.

Examples include:

A less hazardous chemical, lower-pressure process, safer tool, or alternative work method.

Substitution should be evaluated carefully to make sure the replacement does not introduce a different hazard.

Use Engineering Controls

Engineering controls physically separate workers from hazards or reduce exposure through design.

Examples may include:

Machine guards, ventilation, barriers, enclosures, local exhaust systems, vehicle separation, or automated handling.

Engineering controls are generally more reliable than instructions alone because they reduce dependence on individual behavior.

Use Administrative Controls

Administrative controls change how the work is performed.

They may include:

Restricted access, scheduling, warning systems, designated routes, written procedures, permits, work-rest cycles, or coordination between crews.

These controls can be effective, but they depend on consistent implementation.

The JHA should state exactly what is expected.

Select Task-Specific PPE

PPE becomes another layer when exposure remains.

Depending on the hazard, workers may need:

Gloves, eye protection, face protection, protective clothing, hearing protection, respirators, fall protection, or head protection.

The JHA should not simply write:

Wear PPE.

It should identify the appropriate PPE for the exposure.

For example:

Wear chemical splash goggles and the approved chemical-resistant gloves during hose disconnection.

Arbill’s guide on how to perform a PPE hazard assessment can help employers connect remaining job hazards with appropriate protective equipment.

Step 10: Check Whether the Controls Create New Hazards

A control can occasionally introduce a different problem.

A barrier may restrict emergency access.

Heavy protective clothing may increase heat stress.

A new work route may move workers closer to vehicle traffic.

A ventilation system may create unexpected airflow around another process.

Review the proposed control before finalizing the JHA.

Ask workers to test practical changes where appropriate.

Step 11: Assess the Remaining Risk

After controls are selected, evaluate the hazard again.

Has the likelihood decreased?

Has the severity changed?

Is the remaining risk acceptable under the organization’s safety process?

If not, additional controls may be needed.

This step prevents the JHA from assuming that every recommended control automatically solves the problem.

Step 12: Document the JHA

A practical JHA form can be relatively simple.

Useful columns may include:

• Job step
• Hazard or hazardous event
• People exposed
• Likelihood
• Severity
• Risk rating
• Controls
• Responsible person
• Review date

The form should remain easy enough for supervisors and workers to understand at the point of use.

A complicated document that nobody reads provides little practical protection.

Example JHA Entry

Consider a maintenance task involving a process hose.

Job Step: Disconnect transfer hose after isolation.

Hazard: Residual pressure could release chemical toward the worker.

Potential Outcome: Chemical exposure to the eyes, face, or hands.

Controls: Isolate the system, depressurize the line, verify zero pressure, establish a controlled work area, and use approved eye and hand protection.

This entry tells the worker much more than simply writing:

Chemical hazard — wear PPE.

Step 13: Assign Responsibility

Each required control should have an owner.

For example:

Maintenance may be responsible for energy isolation.

A supervisor may establish vehicle barriers.

The task lead may verify PPE availability.

Safety staff may arrange exposure monitoring.

The JHA should make these responsibilities clear before work begins.

Do not start a task while critical controls are still missing.

Step 14: Review the JHA With the Crew

A JHA should not remain in a binder.

Before work begins, review the analysis with the people involved.

Walk through the steps, hazards, controls, and stop-work points.

Workers should have an opportunity to ask questions and identify anything that does not match current conditions.

This discussion can be particularly valuable for:

Nonroutine work, contractor activities, shutdowns, maintenance, and jobs involving several departments.

Step 15: Verify Controls Before Starting Work

Before tools are used, confirm that the controls listed on the JHA actually exist.

If the JHA requires:

A guard, barricade, gas monitor, respirator, fall protection, isolation device, or specific chemical glove,

verify that the equipment is present and ready.

A control written on paper but unavailable at the job site is not an effective control.

Review the JHA When Conditions Change

A JHA should never be considered permanently complete.

Review it whenever the job changes.

Potential triggers include:

New equipment, new chemicals, changed staffing, new work locations, altered procedures, different weather conditions, incidents, near misses, and worker feedback.

The task may have the same name while the risk changes substantially.

Use Near Misses to Improve JHAs

Near misses provide valuable information about whether the analysis captured the real exposure.

If a worker narrowly avoids being struck, cut, splashed, or caught between equipment, compare the event with the existing JHA.

Was the hazard identified?

Was the selected control adequate?

Was the control available?

Did conditions change?

Did the worker understand the procedure?

The answers can help strengthen the JHA before a more serious event occurs.

Connect JHAs With Safety Training

JHAs can improve task-specific training because they show employees how hazards connect to individual job steps.

Rather than delivering generic instructions, supervisors can use the JHA to explain:

Where exposure occurs, what controls are required, why PPE was selected, and when employees should stop work.

Arbill’s EHS safety training can support organizations that need practical employee training around workplace hazards and safe work practices.

Use JHAs During Safety Assessments

JHAs also provide useful information during broader safety audits and assessments.

An assessor can compare:

What the JHA says should happen against what workers actually do.

If the written analysis requires a barrier but none exists, the gap becomes visible.

If employees routinely encounter a hazard that is absent from the JHA, the document needs to be updated.

Arbill’s EHS safety assessments can help employers evaluate whether written programs, task-level controls, PPE, training, and actual workplace practices remain aligned.

Common JHA Mistakes

A JHA can become ineffective when it turns into paperwork instead of a practical safety tool.

Common problems include:

Using broad job descriptions instead of clear task steps, listing hazards without explaining the exposure, writing “use PPE” without identifying the equipment, completing the JHA without worker input, copying an old analysis for a different location, and failing to update the document after workplace changes.

Another common mistake is identifying the hazard correctly but selecting only an administrative control when a stronger engineering or elimination option is available.

The JHA should help improve the job, not simply document that the hazard exists.

A Practical JHA Checklist

Before approving a JHA, confirm that:

• The job is broken into observable steps.
• Workers who perform the job participated.
• Incidents, manuals, SDSs, and relevant records were reviewed.
• Hazards are described as realistic exposure events.
• Nearby workers are considered.
• Likelihood and severity have been evaluated consistently.
• Controls follow the hierarchy of controls.
• Required PPE is specific to the task.
• Control owners are identified.
• Controls are verified before work begins.
• Workers have reviewed the JHA.
• A review trigger or date has been established.

If the form cannot answer these questions, the analysis may need more work.

Conclusion

A Job Hazard Analysis gives employers a practical way to identify risk before an incident occurs.

The process starts by selecting the job, involving the people who perform it, reviewing available information, and observing how the work actually happens.

The job is then divided into clear steps so hazards can be identified at the point where employees may be exposed.

From there, the team evaluates likelihood and severity, selects controls using the hierarchy of controls, assigns responsibility, and verifies that those protections are in place before work begins.

Most importantly, the JHA should remain a living document.

Equipment changes. Materials change. Work areas change. Employees discover practical issues that were not obvious during the original analysis.

Reviewing JHAs after changes, near misses, incidents, and worker feedback helps keep the control plan aligned with actual work.

When used consistently, a JHA turns safety from a general expectation into a task-specific plan workers can understand and apply before the job begins.

Set the Next Audit Date

A safety audit should not be treated as a one-time event.

Workplaces change continuously.

New equipment is installed. Employees change. Chemicals are replaced. Production layouts move. Contractors arrive. Procedures evolve.

Set a future audit date based on the needs of the facility.

Also establish triggers for additional reviews.

These may include:

Major process changes, serious incidents, repeated near misses, regulatory changes, new equipment, new chemicals, or major facility modifications.

Build a Long-Term Safety Roadmap

The most valuable outcome from a safety audit is not a long list of deficiencies.

It is a clear plan for improvement.

Some findings may be corrected immediately.

Others may require several months or significant capital investment.

Organize them into a practical roadmap based on risk, compliance needs, resources, and operational priorities.

Arbill’s EHS safety consulting can support organizations that need help turning assessment findings into written programs, corrective actions, training, and longer-term safety planning.

A Practical Workplace Safety Audit Checklist

Before closing the audit, confirm that the review has addressed the core areas included in its scope.

Check whether:

• Written safety programs reflect current operations.
• Training records match the tasks employees actually perform.
• Incidents and near misses have been reviewed for patterns.
• Walking surfaces, equipment, and emergency routes are safe.
• Chemical storage and SDS information are current.
• PPE matches the task and remains in usable condition.
• Employees have been asked about real working conditions.
• Findings have clear evidence and risk rankings.
• Immediate hazards were escalated during the audit.
• Corrective actions have owners and deadlines.
• Completed actions will be verified.
• Programs and training will be updated where needed.
• The next audit or review date has been established.

The checklist should support the audit process rather than replace professional judgment.

Conclusion

A workplace safety audit provides an evidence-based way to understand whether safety policies, equipment, training, and actual work practices are aligned.

The process begins by defining a clear purpose and scope.

From there, employers should review written programs and records, inspect the workplace, observe employees performing real tasks, and talk with workers about the hazards they encounter.

Findings should then be assessed for risk, separated from compliance status where appropriate, and converted into specific corrective actions.

Each action needs an accountable owner, a realistic deadline, and verification after completion.

The strongest audits do not end with the report.

They lead to updated procedures, better training, safer equipment, stronger controls, and repeat reviews that confirm improvement continues over time.

When safety audits become part of normal operations rather than an occasional compliance exercise, employers gain a clearer picture of where risk exists and a more practical way to reduce it before an incident occurs.