6.1 Hazard and Effect Management Process (HEMP)

6.1 Hazard and Effect Management Process (HEMP)

Quick Answer: HEMP is the four-stage Hazard and Effect Management Process—Identify, Assess, Control, Recover—used to find hazards, judge risk, prevent releases, and mitigate harm after something goes wrong. Supervisors apply it to everyday Nigerian workplace tasks before permits, toolbox talks, and work starts.

The Hazard and Effect Management Process (HEMP) is a cornerstone of supervisory HSE practice on ISPON HSE Level 3. It gives you a repeatable method so hazard thinking is not left to memory or luck. HEMP sits inside broader HSE management systems (ISO 45001, HSG65 PDCA, company HSE-MS). Your job as a supervisor is to run HEMP on the work you control: plan the task, involve the crew, record the outcomes, and keep barriers healthy during execution.

HEMP is often remembered as IACR:

1. Identify — What can hurt people, assets, or the environment?
2. Assess — How likely is it, and how bad could it be?
3. Control — What prevents the hazard from being released?
4. Recover — If it is released anyway, what limits the damage?

Why HEMP Matters at Level 3

Level 1 and 2 introduce hazard awareness. Level 3 expects you to lead the process: facilitate identification with the team, challenge weak assessments, choose proportionate controls, and verify recovery readiness. Examiners often test whether you confuse Control (prevention before release) with Recover (mitigation after release). Hard hats and fire extinguishers both matter, but they sit at different stages of the logic.

Stage 1 — Identify

Identify means systematically finding hazards and the effects they can cause if energy, substance, or unsafe conditions are released. A hazard is the source of potential harm (energized equipment, H₂S, working at height). An effect is the unwanted outcome (fall injury, asphyxiation, fire, pollution).

Supervisory identification tools include:

• Task breakdown and Job Hazard / Job Safety Analysis (JHA/JSA)
• Site walkthroughs and workplace inspections
• Checklists, permits, and method statements
• Incident history, near-miss trends, and toolbox talk feedback
• HAZID/HAZOP outputs for higher-complexity operations (you may not lead HAZOP, but you use its findings)

Nigerian workplace examples — Identify:

• Fabrication yard (Lagos / Port Harcourt industrial areas): grinding and welding near scaffolding — sparks, UV, noise, fall from height, hot-work fire risk to adjacent materials.
• Chemical dosing skid at a water-treatment or process plant: corrosive chemicals, splash to eyes/skin, incompatible storage, spill to drain.
• Confined space (tank, vessel, pit): oxygen deficiency, toxic gas, engulfment, difficult rescue.
• Upstream logistics / journey management: night driving on poor roads, fatigue, vehicle–pedestrian conflict at the gate.

Identification fails when supervisors rush past “we always do it this way,” ignore simultaneous operations (SIMOPS), or forget non-routine steps such as temporary scaffolding removal or night shift lighting.

Stage 2 — Assess

Assess converts the hazard list into prioritized risk. You evaluate likelihood (how often the unwanted event could occur) and severity/consequence (how bad people, environment, asset, or reputation outcomes could be). Assessment may be qualitative (High/Medium/Low), semi-quantitative (matrix scores), or more detailed for major hazards.

At supervisory level you typically:

• Score each significant hazard using the company risk matrix
• Decide which risks are unacceptable without extra controls
• Document assumptions (frequency of exposure, number of people, weather, SIMOPS)
• Escalate high residual risk to the area authority or HSE adviser

Nigerian workplace examples — Assess:

• Hot work on a tank farm during a plant shutdown: likelihood of ignition may be Medium if gas testing and fire watch are planned, but severity of fire/explosion is High — overall risk stays elevated until controls are proven.
• Manual handling of 50 kg cement bags on a construction site: likelihood of musculoskeletal injury may be High with poor technique; severity often Medium — still a priority for redesign or team lifting.
• Working near live overhead lines: even if “we have done it before,” severity of electrocution/arc flash is Extreme — stop and reassess method.

Assessment is not finished when a number is written. You must ask whether the score reflects current conditions (rainy season mud, night work, new contractors, defective barriers).

Stage 3 — Control

Control focuses on prevention barriers that stop the hazard from being released. Prefer higher hierarchy measures (elimination, substitution, engineering) before relying on procedures and PPE. Controls should be specific, assigned, and verifiable.

Examples of Control barriers:

• Eliminate the need to enter a vessel by using remote cleaning
• Substitute a less hazardous solvent
• Engineer guarding, interlocks, ventilation, bunding, and fall-prevention systems
• Administratively use PTW, isolations, gas testing, competence checks, and exclusion zones
• Issue PPE only as a last layer, not the main plan

Nigerian workplace examples — Control:

• Confined space: isolation of lines, forced ventilation, continuous gas monitoring, standby person, rescue plan approved before entry.
• Hot work: gas-free certificate, remove combustibles, dedicated fire watch with extinguisher, PTW live until close-out.
• Vehicle movement on a congested site: one-way traffic plan, banksman, speed limits, segregated pedestrian walkways.

Stage 4 — Recover

Recover assumes prevention can fail. Recovery measures detect, respond, and mitigate after release so effects are limited. Recovery includes alarms, ESD, firefighting, spill response, first aid, medevac, muster, and community notification where relevant.

Nigerian workplace examples — Recover:

• Chemical splash: emergency shower/eyewash within reach, trained first aiders, SDS available, clinic referral pathway.
• Fire during hot work: fire watch remains after work ends for the prescribed period; extinguishers staged; alarm and muster known.
• H₂S release (where applicable): detection alarms, escape routes upwind, emergency breathing apparatus where required, rescue drills.

A common exam trap is treating PPE and fire extinguishers as if they “control” the hazard in the same way as isolation. PPE and many emergency tools are often recovery or last-line measures; primary Control should still aim to prevent release.

Bow-Tie Thinking (Supervisor View)

HEMP maps cleanly to bow-tie logic:

• Left side (threats → top event) = mainly Identify + Assess + Control
• Center (top event) = hazard released / loss of control
• Right side (consequences) = Recover barriers that reduce harm

You do not need to draw a full bow-tie for every toolbox talk, but you should think in barriers: What stops it? What if it fails?

Documentation and Close-Out

Supervisors should leave a trail: risk assessment / JHA, PTW attachments, toolbox talk attendance, gas-test records, and verification that recovery equipment was checked. When work ends, close the loop—cancel permits, restore isolations, and capture lessons if barriers were weak.

Supervisor Checklist for HEMP on a Task

1. Break the job into steps with the crew present.
2. Identify hazards and effects for each step and for SIMOPS.
3. Assess risk with the approved matrix; escalate if red/high.
4. Select Control barriers using the hierarchy of controls.
5. Confirm Recover readiness (people, kit, communications).
6. Brief the team; start only when barriers are in place.
7. Monitor during work; stop if conditions change.
8. Close out and feedback improvements.

Mastering HEMP means you can walk an examiner (or an auditor) through any live job and show how Identify, Assess, Control, and Recover were each addressed—not just that “PPE was issued.”