7.1 Job Hazard Analysis and Job Safety Analysis

Why JHA/JSA Matters at Supervisory Level

Job Hazard Analysis (JHA) and Job Safety Analysis (JSA) describe the same practical method: analyze a specific job at the task level so hazards are found and controlled before work begins. Facility-level HEMP studies and risk matrices set the strategic picture; JHA/JSA turns that picture into step-by-step instructions the crew can use on the pad, in the workshop, or at the wellhead.

For Level 3 candidates, exam scenarios rarely ask you to recite a definition alone. They test whether you know the workflow, who must be involved, how controls should be chosen, and what happens when the written sheet is never discussed with workers. A JHA that sits in a filing cabinet while the crew improvises is an administrative illusion—not a control.

/practice/ng-ispon-hse-level-3Practice questions with detailed explanations

Core Sequence Supervisors Must Master

Memorize and apply this sequence exactly:

1. Break the job into sequential steps
2. Identify hazards associated with each step
3. Determine and assign controls (hierarchy of controls)
4. Communicate, approve, and update before and during work

Many providers also insert an upfront job selection / prioritization stage. Treat selection as Stage 0: you cannot analyze every task on day one, so you focus limited supervisory time where risk is highest.

Stage 0 — Selecting Jobs for Analysis

Prioritize jobs that show one or more of these triggers:

• High historical incident / near-miss frequency
• Potential for severe harm (energy isolation, height, confined space, hot work, toxic release)
• Non-routine or infrequently performed tasks (skills decay)
• Introduction of new equipment, materials, or contractors
• Tasks affected by Management of Change (MoC)
• Work requiring a Permit-to-Work (PTW) package

In Nigerian oil, gas, construction, and manufacturing settings, typical JHA priorities include scaffold erection, flange breaking, vessel entry support, lifting and rigging, chemical drum handling, and night-shift maintenance under SIMOPS.

Stage 1 — Breaking the Job into Steps

Observe the job (or walk it with experienced workers) and write steps in the order they actually happen. Good steps are actionable, observable, and complete from preparation through reinstatement.

Too coarse: “Replace the pump seal” — hides isolation, depressurization, lifting, alignment, and leak testing.

Too fine: “Pick up 14 mm spanner with right hand” — creates noise that nobody will read.

Right level (example — pump seal replacement):

1. Obtain PTW / confirm isolations and zero energy
2. Drain and depressurize the line; verify with gauges
3. Position lifting aid and remove coupling/guard
4. Remove old seal; clean seating surfaces
5. Install new seal; reassemble and align
6. Reinstate, leak-test, remove isolations under procedure
7. Housekeep, restore barriers, close out permit

Involve workers who do the job. Frontline knowledge surfaces shortcuts, informal “workarounds,” and hazards supervisors sitting in the office will miss. That participation also builds ownership of the controls later.

Stage 2 — Identifying Hazards per Step

For every step, ask: What can hurt people, damage assets, or harm the environment here? Classify systematically so you do not fixate on only one hazard type:

• Physical: struck-by, caught-in, falls, noise, heat, vibration, electricity
• Chemical: inhalation, skin contact, fire/explosion from flammables
• Biological: sewage, clinical waste, contaminated soils (site-dependent)
• Ergonomic: heavy lifts, awkward posture, repetitive force
• Psychosocial / human factors: time pressure, fatigue, lone working, unclear roles
• Environmental / SIMOPS: weather, vehicle movement, adjacent hot work, poor lighting

Write hazards against the specific step, not as a generic dump at the top of the form. “Dropped load during hoist of pump cartridge (Step 3)” is usable; “be careful” is not.

Stage 3 — Determining Controls

Apply the hierarchy of controls to each hazard. Level 3 examiners expect you to prefer stronger controls when reasonably practicable:

1. Elimination — remove the task or energy (do the job offline; eliminate the lift)
2. Substitution — less hazardous chemical, smaller packaged load, cooler process fluid
3. Engineering — guards, local exhaust, mechanical lifting aids, interlocks, barriers
4. Administrative — procedures, competency, PTW, exclusion zones, job rotation, supervision
5. PPE — last line of defense; still required when residual risk remains

Each control line should answer: What will be done, who owns it, and how verification looks. Example: “Rigger uses certified chain hoist rated ≥2× load; banksman controls lift path; exclusion zone marked before lift starts.” Vague phrases such as “use caution” fail audits and fail exams.

Link JHA controls to related systems: energy isolation certificates, gas testing, lifting plans, SDS requirements, and emergency response cues (alarm, muster, spill kit location).

Stage 4 — Communicate, Approve, and Keep Alive

A completed form is not the end state. Supervisory duties include:

• Review and approval by a competent supervisor / area authority before work starts
• Toolbox Talk (TBT) at the worksite covering steps, hazards, controls, stop-work triggers, and emergency actions
• Attendance / acknowledgment so every person on the job—including contractors—has heard the briefing
• Dynamic / last-minute risk assessment when weather, SIMOPS, staffing, or equipment changes
• Feedback loop after the job: near misses and practical improvements update the master JHA for next time

Communication checklist for supervisors

• Confirm the right revision of the JHA is at the point of work (document control)
• Ask open questions (“What will you do if the gas detector alarms?”) instead of only lecturing
• Verify critical controls are physically present (barricades, extinguisher, lifting certificate) before authorizing start
• Stop and rewrite when the job method on the ground no longer matches the paper

JHA Versus Broader Risk Tools

JHA does not replace PTW. For hot work, confined space, electrical isolation, and similar activities, the JHA (or equivalent task risk assessment) typically supports the permit package. Likewise, PTW does not replace thinking: if the permit is stamped but the crew never walked the hazards, the system has failed.

Supervisory Pitfalls Exam Questions Exploit

• Treating JHA as salary / HR paperwork instead of a safety planning tool
• Using JHA to bypass PTW rather than to strengthen it
• Keeping JHAs hidden from workers “to save time”
• Copy-pasting last month’s JHA without watching today’s conditions
• Assigning only PPE when an engineering control is available and practicable
• Failing to update the analysis after a near miss or MoC

Master the four-stage core—break job → identify hazards → controls → communicate—and you can defend both field practice and Level 3 multiple-choice logic with the same disciplined reasoning.