Process Safety Management Systems

ISO 45001

Annex SL-aligned OH&S management — beyond compliance, into worker-participation and risk-thinking

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What this system delivers

ISO
45001

ISO 45001:2018 replaced OHSAS 18001 with an Annex SL High-Level Structure shared with ISO 9001 / 14001 — enabling Integrated Management Systems but raising the practical bar significantly. The standard introduced four substantive changes: explicit Plan-Do-Check-Act with risk-based thinking, mandatory leadership and worker-participation evidence (Cl.5.1 and 5.4), interested-party / context analysis (Cl.4.1 / 4.2), and outsourced-process control rigour (Cl.8.1.4). Migration from OHSAS 18001 closed in March 2021 and 100,000+ organisations now hold certification — but real-world maturity remains uneven. Common Stage 2 audit findings concentrate on hazard identification across non-routine and contractor activities (Cl.6.1.2), demonstrable worker participation rather than tokenism (Cl.5.4), legal-and-other requirements register currency (Cl.6.1.3), and operational control of outsourced activity (Cl.8.1.4). Mature deployments integrate with HSG 65 plan-do-check-act, CCPS RBPS for high-hazard sites, and increasingly with ISO 45003 psychological health and safety (2021) for white-collar and shift-work environments.

ISO 45001 — Occupational Health & Safety Management System — Overview
Framework elements

ISO 45001 — element by element

Each element below has its own dedicated implementation page with focused methodology, flow chart, and individual significance for organisations. Click any element to explore.

Context of the Organisation

Internal / external context, interested parties, scope of OH&S management system

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Leadership & Worker Participation

Top-management commitment, OH&S policy, roles, consultation and participation of workers

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Planning

Hazard identification, risk assessment, legal compliance, OH&S objectives

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Support

Resources, competence, awareness, communication, documented information

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Operation

Operational planning and control, hierarchy of controls, MOC, procurement, contractors, emergency preparedness

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Performance Evaluation

Monitoring, measurement, analysis, internal audit, management review

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Improvement

Incident, nonconformity, corrective action, continual improvement

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System implementation

How the system is implemented

A structured, facilitated process — from scope definition through close-out — producing defensible, actionable outputs.

Annex SL Gap Assessment & Context Analysis

Conduct clause-by-clause ISO 45001:2018 gap assessment against current OHSMS or OHSAS 18001 documentation; execute PESTLE-style context analysis per Cl.4.1; map interested parties and their OH&S-relevant requirements per Cl.4.2; scope the OHSMS and determine organisational boundaries per Cl.4.3.

Hazard Identification & OH&S Risk Assessment

Build comprehensive hazard identification covering routine, non-routine, emergency, and outsourced activities per Cl.6.1.2 (IEC 45001's substantially higher bar than OHSAS 18001); classify risks using the elimination/substitution/engineering/admin/PPE hierarchy per Cl.8.1.2; document opportunity and risk register per Cl.6.1.1.

Legal Register, Controls & Worker Participation

Build legal-and-other-requirements register with applicability tagging, currency dates, and evidence traceability per Cl.6.1.3; design worker-participation framework per Cl.5.4 with documented mechanisms beyond consultation tokenism; implement OH&S objectives with monitoring plan per Cl.6.2.

Emergency Preparedness & Contractor Control

Develop emergency preparedness and response procedures per Cl.8.2 with drill schedule and learning-capture; implement outsourced-process control per Cl.8.1.4 covering contractor pre-qualification, site-induction, work-control, and performance review; integrate ISO 45003 psychological H&S and fatigue-risk management.

Internal Audit & Performance Monitoring

Establish internal audit programme per ISO 19011 with competency requirements, sampling plan, and finding triage; configure TRIR / LTIFR / near-miss / leading-indicator dashboard; implement management-review agenda per Cl.9.3 with input/output requirements and corrective-action escalation path.

Stage 1 / Stage 2 Certification Preparation

Conduct pre-certification desktop readiness review addressing top Stage 1 nonconformity patterns; perform Stage 2 trial audit against accredited certification criteria; produce corrective-action evidence packs for typical Cl.5.4 (worker participation), Cl.6.1.2 (non-routine hazards), and Cl.8.1.4 (outsourced-process) findings.

ISO 45001 — Occupational Health & Safety Management System — Scope
System scope

What the system covers in full

Annex SL HLS gap assessment — context, interested parties, leadership, planning, support, operation, performance, improvement
Cl.4 context analysis with PESTLE-style external / internal mapping
Worker participation framework per Cl.5.4 — beyond consultation toolkits to demonstrable influence
Hazard identification across routine, non-routine, emergency, and outsourced activities (Cl.6.1.2)
Legal-and-other requirements register with currency maintenance and applicability tagging
Operational control hierarchy per Cl.8.1.2 — elimination, substitution, engineering, admin, PPE
Outsourced-process control rigour (Cl.8.1.4) — contractor management and supply-chain OH&S
Emergency preparedness per Cl.8.2 with drill and learning-capture
ISO 45003 integration for psychological health, fatigue, and shift-work risk
Internal audit per ISO 19011, management review per Cl.9.3, and 3-yearly recertification readiness
Why it matters

Outcomes of ISO 45001

Workplace Hazard Control Quality
  • Closes the systemic gap between paper system and shop-floor reality
  • Drives worker-participation discipline that surfaces field-level hazards
  • Tightens contractor and outsourced-activity OH&S oversight
  • Embeds psychological-H&S risk via ISO 45003 integration
ISO 45001:2018 Certification Defence
  • ISO 45001:2018 certification withstanding accredited Stage 2 examination
  • Aligns with India BOCW / Factories Act, OSHA, EU OSH Framework Directive 89/391
  • Satisfies customer / tender / Tier-1 supplier OH&S requirements
  • Integrates seamlessly with ISO 9001 / 14001 IMS audit cycles
TRIR / LTIFR Performance
  • Reduces TRIR / LTIFR trajectory measurably across multi-year baselines
  • Worker-participation quality lifts hazard-identification yield
  • Standardises operational controls across multi-site / multi-geography groups
  • Sharpens contractor pre-qualification through evidence-based criteria
Workers' Comp & Liability Reduction
  • Trims workers' compensation and employers' liability premiums
  • Avoids OH&S enforcement action and director-officer exposure
  • Reduces incident-driven business interruption
  • Supports ESG-rating and customer-tier qualification
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