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Risk Based Process Safety (RBPS)Learn from Experience

Incident Investigation

Multi-method RCA with corrective-action close-out and recurrence prevention

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Strategic context

What this element is — and why it matters

Incident Investigation is the structured learning discipline that converts every incident, near-miss, and significant deviation into recurrence-prevention action. The element maps to OSHA PSM 1910.119(m), which requires investigation of any catastrophic-release-potential incident within 48 hours. Modern programmes integrate multiple RCA methods (TapRoot, Apollo, ECFC, MORT, CCFs), just-culture facilitation per James Reason, and electronic action-tracking systems.

Individual significance for organisations

Organisations that learn from incidents prevent recurrence; those that don't suffer the same incidents repeatedly. The element is also a strong indicator of culture maturity — a site that reports near-misses and investigates them deeply has psychological safety; a site that doesn't has hidden problems. Investigation quality is a powerful organisational diagnostic.

Contribution to Risk Based Process Safety (RBPS)

Incident Investigation is the feedback loop that closes Pillar 4 — Learn from Experience. It feeds Measurement & Metrics (Element 18) with Tier 1-2 PSE data, drives Auditing (Element 19) priority areas, informs Management Review (Element 20), and triggers MOC (Element 13) corrective actions. Element 17 also closes the loop back to Pillar 1 Culture (Element 1) through just-culture application.

Key requirements

What compliant execution looks like

Investigation of catastrophic-release-potential incidents within 48 hours per OSHA PSM (m)

Multi-method RCA — TapRoot, Apollo, Causal Tree, ECFC, MORT

Just-culture facilitation per James Reason / Sidney Dekker

Latent / organisational / cultural root cause depth

Corrective action tracking through close-out and verification

Lessons-learned sharing across sites and corporate

Implementation methodology

How we implement this element

A focused 6-step methodology calibrated to deliver incident investigation as a working capability — not a documented compliance artefact.

Investigation Trigger & Scope

Define investigation trigger per OSHA PSM (m) and corporate threshold; preserve evidence chain; secure DCS / historian / CCTV data.

Team Formation & Charter

Multi-discipline team with independent chair; specify time-bound mandate; align with just-culture principles.

RCA Methodology Application

Apply RCA method appropriate to incident complexity — TapRoot for systematic, Apollo for human-factor, ECFC for sequence; document causal chain.

Latent Cause Analysis

Reach beyond physical / immediate causes to latent organisational and cultural factors; apply substitution test per just culture.

Corrective Action Design

Per hierarchy of controls — elimination, substitution, engineering, administrative, PPE; specify monitoring KPI for effectiveness verification.

Lessons Learned & Sharing

Issue investigation report, distribute across sites, integrate with API RP 754 PSE indicators, corporate HSE governance.

Implementation flow

Element-implementation flow chart

Decision-gated workflow showing the actual sequence of activities — from initiation through steady-state operation — with key decision points highlighted.

Start

Incident or near-miss reported

Decision

Catastrophic-Potential?

Decision gate per OSHA PSM (m) threshold

48-Hour Initiation

Team formed, evidence preserved, scene secured

Evidence Collection

DCS historian, CCTV, witness statements, samples

RCA Method Selection

TapRoot / Apollo / ECFC / Causal Tree per complexity

Causal Chain Construction

Physical → immediate → latent → organisational causes

Just-Culture Application

Substitution test per James Reason — error / at-risk / reckless

Corrective Action Design

Hierarchy of controls with effectiveness KPI

Action Owner & Close-Out

Documented owner, target date, verification protocol

Report Issued

Investigation report + lessons learned distributed

Cross-Site Sharing

Corporate HSE governance + API RP 754 PSE indicators

Deliverables

What we produce

Investigation procedure with 48-hour trigger per OSHA PSM (m)
RCA methodology selection guidance
Just-culture facilitation training
Corrective action tracking database
Lessons-learned sharing protocol
Annual investigation programme review

Common pitfalls

Where execution fails

Investigation stopping at operator-error closure
Just culture announced but blame-based application
Corrective actions filed but never closed
Lessons learned not shared across sites

Implement this element

Talk to us about implementing Incident Investigation

We can scope this element implementation against your facility, regulatory context, and existing management-system maturity — and integrate it with the other Risk Based Process Safety (RBPS) elements you already operate.

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