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Last Updated on October 12, 2026

What Is a Job Safety Analysis (JSA)? The Complete Guide 

Quick answer:

A job safety analysis (JSA) is a task-level method for preventing injuries. You break a job into steps, identify the hazards in each step, and set up controls using the hierarchy of controls. It is also called job hazard analysis (JHA). No OSHA standard requires a JSA by that name, but OSHA describes the method in Publication 3071, and several standards require hazard assessments that a JSA can support. 

Key facts 

  • Also called job hazard analysis (JHA). 
  • OSHA guidance: Publication 3071, Job Hazard Analysis. 
  • No OSHA standard requires a JSA by that name. 
  • OSHA does require a written certification of the PPE hazard assessment under 29 CFR 1910.132(d)(2). 
  • Review a JSA after incidents, job changes, and a new or revised Safety Data Sheet (SDS). 
Lindsay Jacobson

Written & reviewed by

Lindsay Jacobson

Controller, Neptune Aviation Services · 18+ years in audit and compliance controls (former KPMG)

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What is a job safety analysis? 

A job safety analysis (JSA) is a structured look at one job, one step at a time, to find what could hurt someone and prevent it before the work starts. OSHA's booklet on the method, Publication 3071, describes it as a technique that focuses on job tasks to identify hazards before they occur. It looks at the relationship between four things: the worker, the task, the tools, and the work environment. 

The result is usually a short table of steps, hazards, risk, controls, and who is responsible. A JSA written at a desk from memory misses what watching the job and talking with the crew will catch. 

Is a JSA the same as a JHA? 

Yes. They are two names for the same method. OSHA's booklet uses "job hazard analysis," and many employers say "job safety analysis." No OSHA standard defines them differently. Our guide to the difference between a JSA, JHA, AHA, and JSEA explains each term. 

What a JSA is not 

  • Not a standard operating procedure (SOP). An SOP tells workers how to do the job. A JSA examines the job for hazards. 
  • Not a site-wide risk register. A register ranks risks across a facility. A JSA covers one job. 
  • Not a process of hazard analysis (PHA). A PHA examines a whole process and is required for processes covered by OSHA's process safety management standard, 29 CFR 1910.119(e). 

Why is job safety analysis important? 

A JSA moves hazard finding the front of the job before anyone is hurt. It also does other work: 

  • It uses what workers already know. OSHA 3071 says employees have a unique understanding of the job that is invaluable for finding hazards. 
  • It trains new workers. A finished JSA shows a new employee the steps and the reason behind each precaution. 
  • It gives incident reviews a starting point. After an injury or close call, compare what happened with what the JSA expected. 
  • It improves procedures. A step-by-step review often shows that the written procedure and the real work have drifted apart. 

Some pages say JSAs cut injuries by a specific percentage. We found no primary source for a number, so this guide does not give one. 

Is job safety analysis required by OSHA? 

No OSHA standard requires a document called a JSA or a JHA. Pages that say OSHA requires a JSA in construction or manufacturing are not accurate. Several OSHA standards do require employers to assess hazards, train workers, and keep specific written items. 

A JSA is often used to carry out the hazard assessment these standards require. It does not replace the written procedures, permits, or certifications they specify. For PPE, a JSA can serve as the written certification under 1910.132(d)(2) only if it contains every required element. 

That certification has four elements: the workplace evaluated, the person certifying that the evaluation has been performed, the date or dates of the hazard assessment, and a statement that identifies the document as a certification of hazard assessment.

OSHA standards that call for a hazard assessment or a written item 

Standard  What it requires  Where a JSA fits 
29 CFR 1910.132(d)  Assess the workplace for hazards that call for PPE and certify the assessment in writing. Does not apply to 1910.134 or 1910.137.  Can carry out the assessment. Is the certification only with all four elements? 
29 CFR 1910.147(c)(4) Develop, document, and use energy control procedures for servicing and maintenance of the standard covers.  Points to the procedure. Does not replace it. 
29 CFR 1910.146(c)(4), (e), (f)  A written permit space program and an entry permit when employees enter permit-required confined spaces.  References the permit. Is not a permit. 
29 CFR 1910.1200(h)  Information and training on hazardous chemicals at initial assignment and when a new chemical hazard is introduced.  Shows which chemicals and hazards the task involves. 
29 CFR 1926.21(b)(2)  In construction, instruct each employee to recognize and avoid unsafe conditions.  Can organize that instruction by task. 
OSH Act Section 5(a)(1)  Keep the workplace free from recognized hazards that are causing or are likely to cause death or serious physical harm.  One way to find those hazards and act on them. 

 When contracts or states require one 

  • Federal construction contracts. The U.S. Army Corps of Engineers manual EM 385-1-1 (March 15, 2024) requires an activity hazard analysis before each work activity, task, or definable feature of work. Our guide to the difference between a JSA, JHA, AHA, and JSEA covers it. 
  • State Plans. OSHA lists 22 state plans that cover private sector and state and local government workers and seven that cover state and local government workers only. Each must be at least as effective as federal OSHA, and rules can differ. In California, 8 CCR 3203(a)(4) requires procedures for identifying and evaluating workplace hazards, including scheduled periodic inspections. 
  • Customers and site owners. A host employer or project owner may require JSAs from contractors by contract or prequalification. 

Voluntary standards 

ISO 45001 addresses hazard identification in clause 6.1.2, and ANSI/ASSP Z10 includes risk assessment. OSHA’s Recommended Practices for Safety and Health Programs (OSHA 3885, 2016) lists hazard identification and assessment as a core element. OSHA calls those practice recommendations only. 

Which jobs should get a JSA first? 

OSHA 3071 says to give priority to these jobs: 

  • 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 previous accidents. 
  • Jobs in which one simple human error could lead to a severe accident or injury. 
  • Jobs that are new to your operation or have changed. 
  • Jobs are complex enough to require written instructions. 

Include non-routine work such as maintenance and cleaning, where workers have less practice. If a hazard poses an immediate danger to life or health, OSHA 3071 says to act right away to protect the worker. Do not wait for the JSA. 

Who should conduct a JSA? 

OSHA 3071’s list of where to begin starts with “Involve your employees.” A typical team has four roles: 

  • The workers who do the job. They know how the work is really done. 
  • Their supervisor. Know the schedule, the crew, and the equipment. 
  • The EHS lead. Brings the standards, the SDSs, and the incident history. 
  • A designated reviewer. The person your organization names to review and approve a JSA before use. 

We call “designated reviewers” on purpose. “Competent person” and “qualified” have specific definitions in OSHA’s construction standards at 29 CFR 1926.32(f) and (m). A JSA reviewer does not automatically meet either one. 

Be clear about what each signature means. A worker’s signature shows that the worker was briefed. It does not show that the JSA is correct or compliant. As good practice, the person who wrote the JSA should not be the person who approves it. 

How do you conduct a job safety analysis? 

Here is the method in eight steps: 

  • Select and prioritize the job. 
  • Review incidents, near-miss, and injury records. 
  • Observe the job and break it into steps. 
  • Identify the hazards in each step. 
  • Assess the risk. 
  • Choose controls using the hierarchy of controls. 
  • Document, communication, and training. 
  • Review and update the JSA. 

OSHA 3071 does not number the method as eight steps. This is our arrangement of the same work. Our step-by-step guide to conducting a JSA walks through each step with a worked example. 

What hazards should a JSA identify? 

For each step, OSHA 3071 asks: What can go wrong? What are the consequences? How could it arise? What are other contributing factors? How likely is it that the hazard will occur? 

The prompt list below groups the common hazards in OSHA 3071 Appendix 2 and adds two categories, Biological and Other. 

Hazard group  Examples 
Chemical  Toxic, flammable, or corrosive chemicals 
Fire and explosion  Fire and heat, chemical reaction, over-pressurization 
Electrical  Shock, short circuit, electrical fire, static discharge, loss of power 
Falls and excavation  Slips, trips, falls, and excavation collapse 
Mechanical  Moving parts, vibration, and mechanical failure 
Struck by or struck against  Moving, falling, or fixed objects 
Noise and radiation  Noise, ionizing radiation, non-ionizing radiation 
Temperature, weather, and visibility  Heat, cold, snow, rain, wind, ice, poor visibility 
Biological  Bloodborne pathogens, mold, insects, animals 
Other  Site-specific hazards not covered above 

How to use the Safety Data Sheet in a JSA 

When a job involves a chemical, put the SDS facts the crew needs into the JSA itself. In an emergency, people get tunnel vision and cannot search a binder for what they need. With the key facts on the JSA, the crew reviews them before work starts and knows what to watch for.

Start with Section 8. It states the exposure limits, so you can check that the task will not exceed them. It lists the engineering controls the product calls for, so no one has to guess. It also names the specific PPE, such as the glove material, not just “gloves.” When a hazard cannot be eliminated, PPE is the last line of defense, so that detail matters.

SDS section What to take from it
8. Exposure controls/personal protection Exposure limits, engineering controls, and the specific PPE. Start here.
2. Hazard(s) identification The signal word, the hazard statements, and the pictograms. Write out the hazard statements. A pictogram alone means little to a worker who does not know the symbols.
1. Identification The product name exactly as it appears on the SDS, plus the manufacturer and the emergency phone number. This lets the crew confirm they have the right SDS for the product in hand.
3. Composition/information on ingredients The chemical name and concentration are exactly as shown on the SDS. Add other ingredients if they change the hazard.
4. First-aid measures Only the first aid that fits the exposures in this task. For a chemical transfer, include skin and eye contact, how long to flush, and when to get medical help.
7. Handling and storage Handling precautions for this task and what the product must be kept away from, such as open flames or incompatible materials.

Write these entries in plain language that every worker can understand, not just management. The crew in the work area uses the JSA most, so keep each entry brief and readable at any level of experience or education.

Some sections are only needed for certain jobs: 

SDS section Add it when
5. Fire-fighting measures The chemical is combustible, or an ignition source is nearby. Note which ignition sources to keep away. Example: hot work near stored solvent.
6. Accidental release measures There is a spill risk. Coordinate the JSA with the site spill plan. Example: mechanics handling drums of oil.
9. Physical and chemical properties A property of the chemical changes that controls what you need. Examples: a low flash point, or a vapor heavier than air that collects in low areas.
10. Stability and reactivity The task mixes chemicals, including dilution. Example: diluting caustic, or cleaning a tank that held a different product.
13. Disposal considerations The work creates chemical waste. Include what the crew needs to prevent hazards, including releases to storm sewers and drains. OSHA treats Section 13 as non-mandatory, so a short briefing is good practice rather than a requirement. Example: draining and cleaning equipment.

Three more points keep the chemical rows right: 

  • Link the full SDS. The JSA summarizes it and does not replace it. Under 29 CFR 1910.1200(g)(8), the SDS must still be readily accessible to employees in their work area during each work shift.
  • Match the SDS to the product on the floor. Formulations differ between manufacturers and change between revisions, and one change can affect the exposure limits, the PPE, and other sections. Wrong information can lead to the wrong protection. Matching the product name and manufacturer is also how the crew confirms they have the right chemical.
  • Treat NFPA and HMIS ratings as a secondary tool. Many workers do not know what the numbers mean, so a rating on its own can mislead. The scales also run opposite: 4 is the most hazardous on the NFPA diamond, and Category 1 is the most severe in SDS Section 2.

Section 8 lists the OSHA permissible exposure limit and the ACGIH threshold limit value where they exist. OSHA’s limits are in 29 CFR 1910.1000, Tables Z-1 through Z-3. NIOSH publishes recommended exposure limits in its Pocket Guide to Chemical Hazards. One detail to check: OSHA’s Hazard Communication Standard has four acute toxicity categories. A “Category 5” does not come from OSHA’s classification. 

How do you rate the risk in a JSA? 

Rate each hazard so the team can tell which needs the most attention. This guide uses the severity and probability tables from MIL-STD-882E, the U.S. Department of Defense standard practice for system safety. It is a defense standard, not an OSHA requirement. We borrow it because its definitions are public and specific. 

You read the rating from a table. Nothing is multiplied. One severity category and one likelihood level give a code such as 2C and a risk level. 

Severity. The standard categories also cover environmental damage and monetary loss. The injury and illness wording are shown here. 

Number  Category  Could result in 
1  Catastrophic  Death or permanent total disability 
2  Critical  Permanent partial disability, or injuries or occupational illnesses that may result in hospitalization of at least three people 
3  Marginal  Injury or occupational illness resulting in one or more lost workdays 
4  Negligible  Injury or occupational illness not resulting in a lost work day 

Likelihood. The standard writes these for “an item.” For a JSA, read “item” as the job. 

Level  Name  Description in the standard 
A  Frequent  Likely to occur often in the life of an item 
B  Probable  Will occur several times in the life of an item 
C  Occasional  Likely to occur sometime in the life of an item 
D  Remote  Unlikely, but possible to occur in the life of an item. 
E  Improbable  So unlikely, it can be assumed the occurrence may not be experienced in the life of an item. 
F  Eliminated  Incapable of occurrence. Used when a hazard has been identified and later eliminated 

Risk level. Find the likelihood row, then read across to the severity column. 

Likelihood  1 Catastrophic  2 Critical  3 Marginal  4 Negligible 
A Frequent  High  High  Serious  Medium 
B. Probable  High  High  Serious  Medium 
C Occasional  High  Serious  Medium  Low 
D Remote  Serious  Medium  Medium  Low 
E Improbable  Medium  Medium  Medium  Low 
F Eliminated  Eliminated  Eliminated  Eliminated  Eliminated 

Rate each hazard twice: before controls (initial risk) and after (residual risk). Level F applies only when the hazard is gone. The standard is direct: no amount of training, warning, or PPE moves a hazard to Eliminated. 

The standard does not say what a workplace should do at each level. Your organization sets that rule. This table is an example to adapt. It uses the rating after controls. 

Risk after controls  Can work start? (example) 
High  No. Change the job: remove the hazard, substitute, or add an engineering control. Then rate it again. 
Serious  Only with sign-off. The designated reviewer and the supervisor both sign the JSA, and at least one control above administrative controls and PPE is in place. 
Medium  Yes, once the supervisor confirms at the job site that each listed control is in place. 
Low  Yes. The crew follows the JSA and stops to report any change in conditions. 

How do you apply the hierarchy of controls in a JSA? 

NIOSH lists five kinds of controls in a preferred order based on general effectiveness. Work from the top down. The examples are for a job with a corrosive liquid. 

  • Elimination. Remove the hazard. Example: buy the chemical in the container size you use, so the manual transfer goes away. 
  • Substitution. Replace the hazard with a lesser one. Example: use a lower concentration that still does the job. 
  • Engineering controls. Put a barrier between the worker and the hazard. Examples: a closed transfer pump, a splash guard, and secondary containment. 
  • Administrative controls. Change how people work. Examples: a written procedure, training, and container labels. 
  • Personal protective equipment (PPE). Protect the worker's body. Examples: chemical goggles, gloves of a material the SDS lists, and an apron. 

PPE comes last because it leaves the hazard in place. It works only if it is the right type, fits, and is worn every time, and it protects only the wearer. Reach for it after the higher controls, not in place of them. 

Job safety analysis example 

This example covers one task: pumping sodium hydroxide solution from a 55-gallon drum into a 5-gallon secondary container. The chemical details come from a manufacturer's SDS for sodium hydroxide solution, 30 to 54 percent, revised January 21, 2025. It is an illustration. Build your own JSA from your job, your site, and the SDS for your product. 

What the SDS says 

  • Section 2: Signal word "danger." Corrosion and exclamation mark pictograms. May be corrosive to metals. Harmful if swallowed. Causes severe skin burns and eye damage. 
  • Section 8: OSHA limit of 2 mg/m³ as an 8-hour time-weighted average. ACGIH ceiling of 2 mg/m³. Chemical goggles. Gloves of butyl rubber, nitrile rubber, neoprene, Viton, or PVC. Chemical-resistant clothing, with a face shield, boots, or apron depending on the task. 
  • Section 4: Wash skin in flowing water for at least 20 minutes while removing contaminated clothing. Wash eyes for a minimum of 20 minutes. An eyewash and safety shower should be immediately available. 
  • Sections 7 and 10: Do not store in zinc, aluminum, brass, or tin. Those metals can generate flammable hydrogen. Avoid acids. Mixing with water generates heat. 
Example JSA: Pumping sodium hydroxide solution from a 55-gallon drum into a 5-gallon secondary container
Step Hazard Initial risk Controls Residual risk Responsible
1. Inspect the drum, pump, container, and work area Leak or residue contacts skin or eyes. Incompatible metal in the pump or container. 2C Serious Check the drum for leaks. Use a pump and container free of zinc, aluminum, brass, and tin. Confirm the eyewash and shower work. 2D Medium Supervisor
2. Put on PPE Wrong glove material, or eye protection that does not seal. 2C Serious Chemical goggles with a face shield over them. Gloves of a material listed in SDS Section 8. Chemical-resistant apron and boots. Inspect each item. 2D Medium Worker
3. Pump the solution into the secondary container Splash to the face, eyes, or skin. Overfill. Container tips over. 2B High Use a drum pump so the drum is not tipped. Set the container in a containment tray on a stable surface. Pump slowly and stop at the fill line. 2D Medium Worker
4. Close and label the secondary container A coworker later uses an unmarked container. 2C Serious Label it under 29 CFR 1910.1200(f)(6). The container will be stored, so the portable container exception in (f)(8) does not apply. 2E Medium Worker
5. Clean up, remove PPE, and wash Drips cause skin contact or a slip. Contaminated gloves spread residue. 3C Medium Clean up drips per SDS Section 6 and the site spill procedure. Close the drum. Remove PPE without touching the glove exteriors. Wash hands. 3D Medium Worker

Three points apply to any chemical JSA: 

  • The SDS and the JSA do different jobs. This SDS calls for chemical goggles and leaves the face shield to the task. The JSA adds it because pumping creates a splash hazard at face height. 
  • Numbers come from the SDS in hand. The 20-minute flush time is from this SDS. Another product may state a different time. 
  • Some controls are also OSHA requirements. Where eyes or body may be exposed to injurious corrosive materials, 29 CFR 1910.151(c) requires suitable facilities for quick drenching or flushing within the work area. 

What should a JSA form include? 

A JSA form needs enough detail that someone who was not in the room can follow it. 

  • Job title and task description 
  • Location 
  • Date of the analysis 
  • Who prepared it and who took part 
  • The designated reviewer and the approval date 
  • Required PPE 
  • The step, hazard, risk, and control table 
  • Links to the SDSs used, with their revision dates 
  • Crew sign-off showing who was briefed 
  • Revision number and history 

When should a JSA be reviewed or updated? 

OSHA sets no fixed review interval. OSHA 3071 says to review a job hazard analysis periodically, and particularly if an illness or injury occurs on the job. A set interval, such as once a year, is a company choice, not an OSHA requirement. 

Review the JSA when any of these happen: 

  • An injury, illness, or close call on the job 
  • A change to the process, the equipment, or the chemicals 
  • A new or revised SDS for a product the job uses 
  • A change in the standards that apply to the job 

The SDS trigger is timely. OSHA updated the Hazard Communication Standard in 2024, and revised SDSs are arriving. Under 29 CFR 1910.1200(j), as extended in January 2026 (91 FR 1695), employers have until November 20, 2026 to update alternative workplace labeling, the hazard communication program, and training as necessary for substances. The matching employer date for mixtures is May 19, 2028. When a revised SDS arrives, compare Sections 2 and 8 with the JSA. 

Any time you revise a JSA, OSHA 3071 says to train the employees affected by the change. 

Common JSA mistakes to avoid 

  • Leaving out the workers. Without the people who do the job, a JSA describes the job as someone imagines it. 
  • Starting with PPE. If every control is gloves and glasses, the team skipped the first four levels of the hierarchy. 
  • Filing it and moving on. An unreviewed JSA describes a job that no longer exists. 

Our step-by-step guide to conducting a JSA covers the mistakes inside each step. 

JSA vs. risk assessment, PHA, SOP, and permit-to-work

Tool  Scope  When it is used  Required by  Output 
JSA  One job, step by step  Before a job is first done and when it changes  No OSHA standard by that name. Contracts or policies may.  Step, hazard, risk, and control table 
General risk assessment  A site, department, or activity  Planning and periodic review  Varies by standard and by management system  Ranked list of risks 
Process hazard analysis (PHA)  A whole covered process  Initially, then at least every five years  29 CFR 1910.119(e), for covered processes  PHA report and findings 
Standard operating procedure (SOP)  How to do a job  Every time the job is done  The employer, and some standards, such as 29 CFR 1910.147(c)(4)  Written instructions 
Permit-to-work  One job in one time window  Before specific high-hazard work  Specific standards, such as 29 CFR 1910.146(e) and (f)  Signed permit 

Paper vs. digital JSAs 

Paper JSAs work, but old versions stay in circulation, and the SDS sits in a different binder. 

A digital JSA can help with version control, sign-off at the point of work, a link to the current SDS, and a record of changes. The method stays the same in either format. 

Job safety analysis FAQs

  • How long does a JSA take?

It depends on the job. Plan time to watch the work being done, not only to fill in the form.

  • How often should a JSA be updated?

OSHA sets no fixed interval. Review it periodically after any injury, illness, or close call, and when the process, equipment, chemicals, or SDS changes.

  • Who signs a JSA?

The designated reviewer approves it. The crew signs to show they were briefed, not that the JSA is correct or compliant.

  • What is the difference between a JSA and an SOP?

An SOP is an in-depth how-to manual for a procedure or task. A JSA is an overview of the potential hazards and their consequences. It does not detail how to do the job.

It is not a standalone legal requirement. OSHA can cite an employer under the General Duty Clause, Section 5(a)(1), when a recognized hazard that is likely to cause death or serious physical harm goes uncorrected and a feasible fix exists. A documented hazard analysis is your record that you looked for hazards and acted on them.

  • Can one JSA cover multiple sites?

Not directly. It needs a thorough review and a site-specific re-evaluation first. Think of the first site’s JSA as the bare bones of the new one. Do not assume all the information carries over. Many factors can change any part of a JSA, including small things we do not think about, like weather, minor upgrades, and even the employees using the machine.

  • What is a JSA in construction?

It is the same method on a site that keeps changing. The worksite changes daily, the weather shifts, and the terrain and building phases keep evolving, so the JSA is re-evaluated or rewritten often as crews move to new phases. A plant is more stationary and predictable, so a baseline JSA for recurring maintenance or cleanup can be reused after review. OSHA requires construction employers to instruct each employee to recognize and avoid unsafe conditions (29 CFR 1926.21(b)(2)).

  • Do contractors need their own JSA?

In practice, yes. A subcontractor does not simply work under the general contractor’s JSA in place of its own. The two teams often coordinate or cross-reference their JSAs to manage overlapping hazards, handoffs between crews, and shared site conditions.

References 

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