Accident investigation Course

Lesson 1 • Types and Scope of Incidents

Differentiates near-misses, injuries, fatalities, and property damage events. Scope determination guides resource allocation and investigation depth.

Lesson 2 • Ethics and Investigator Conduct

Covers impartiality, confidentiality, and conflict-of-interest avoidance. Ethical conduct protects investigation integrity and participant trust.

Lesson 3 • Roles and Responsibilities

Maps investigator, supervisor, safety officer, and management roles. Clear role definition prevents gaps and conflicts during active investigations.

Lesson 4 • Legal and Regulatory Context

Surveys regulatory reporting requirements and legal privilege considerations without jurisdiction-specific codes. Investigators navigate compliance without compromising findings.

Lesson 1 • Swiss Cheese and Barrier Models

Explains how latent and active failures align to breach defences. Barrier analysis becomes a practical tool for identifying systemic weaknesses.

Lesson 2 • Systems Thinking in Incidents

Introduces sociotechnical systems perspective where incidents emerge from interactions. Investigators move beyond individual error to organisational and environmental factors.

Lesson 3 • Organisational and Cultural Factors

Examines how management decisions, production pressure, and safety culture create incident preconditions. Investigators recognise upstream organisational contributors.

Lesson 4 • Human Factors and Error Types

Categorises slips, lapses, mistakes, and violations using established human factors taxonomy. Understanding error types directs corrective actions toward effective interventions.

Lesson 1 • Digital and Electronic Evidence

Addresses data extraction from control systems, cameras, wearables, and logs. Digital evidence requires specialised handling to prevent alteration or loss.

Lesson 2 • Physical Evidence Collection

Guides identification, tagging, and chain-of-custody procedures for physical items. Proper collection ensures evidence admissibility and analytical integrity.

Lesson 3 • Scene Documentation Techniques

Covers photography, video, sketching, and measurement methods for capturing scene conditions. Systematic documentation creates a permanent, defensible record.

Lesson 4 • Scene Release and Reconstruction

Establishes criteria for releasing a scene and techniques for physical reconstruction. Reconstruction validates hypotheses before the scene is disturbed.

Lesson 1 • Managing Trauma and Stress Responses

Identifies trauma indicators and adjusts interview approach accordingly. Trauma-informed practice protects witness wellbeing and improves information reliability.

Lesson 2 • Recording and Validating Accounts

Covers note-taking, audio recording consent, and statement validation with witnesses. Accurate records enable cross-referencing with physical and documentary evidence.

Lesson 3 • Avoiding Bias and Leading Questions

Identifies question types that contaminate witness memory and teaches neutral phrasing. Bias-free questioning preserves the evidentiary value of witness accounts.

Lesson 4 • Interview Planning and Preparation

Covers witness prioritisation, environment selection, and pre-interview evidence review. Preparation prevents leading questions and ensures comprehensive topic coverage.

Lesson 1 • Fault Tree Analysis

Constructs top-down logic trees to model combinations of failures leading to an event. Fault trees quantify probability pathways in complex technical systems.

Lesson 2 • Bow-Tie and Barrier Analysis

Maps threats, barriers, and consequences in a visual bow-tie diagram. Barrier analysis identifies which controls failed and which held during the incident.

Lesson 3 • Selecting the Right Method

Provides decision criteria for matching RCA method to incident type and complexity. Method selection affects investigation efficiency and depth of findings.

Lesson 4 • Five Whys and Why-Because Analysis

Applies iterative questioning to trace surface causes to systemic roots. Students recognise when to stop asking why and how to avoid single-cause traps.

Lesson 1 • Prioritising and Sequencing Actions

Ranks corrective actions by risk reduction potential, feasibility, and urgency. Sequencing ensures critical controls are implemented before lower-priority improvements.

Lesson 2 • Hierarchy of Controls Application

Applies elimination, substitution, engineering, administrative, and PPE controls to findings. Higher-order controls receive priority to maximise long-term risk reduction.

Lesson 3 • SMART Corrective Action Writing

Structures corrective actions as specific, measurable, achievable, relevant, and time-bound statements. Clear action statements enable accountability and progress tracking.

Lesson 4 • Verification and Effectiveness Review

Establishes methods to confirm corrective actions are implemented and effective. Effectiveness review closes the loop between investigation findings and risk reduction.

Lesson 1 • Evidence-Based Factual Statements

Distinguishes confirmed facts from assumptions and speculation in written findings. Evidence-linked statements protect report credibility under scrutiny.

Lesson 2 • Causal Narrative Construction

Translates analytical findings into a coherent causal story connecting events to root causes. A clear narrative makes complex causation accessible to all readers.

Lesson 3 • Report Review and Quality Assurance

Applies peer review, factual accuracy checks, and logical consistency tests before release. Quality assurance prevents errors that undermine report authority.

Lesson 4 • Writing for Multiple Audiences

Adapts technical content for executives, regulators, workers, and legal reviewers. Audience-appropriate language increases report impact and usability.

Lesson 1 • Continuous Improvement and Learning Systems

Integrates investigation findings into organisational learning systems and safety management frameworks. Systemic learning transforms individual investigations into lasting safety improvements.

Lesson 2 • High-Consequence and Catastrophic Events

Adapts investigation approach for fatalities, mass casualty events, and public-impact incidents. High-consequence investigations require enhanced rigor, sensitivity, and coordination.

Lesson 3 • Managing Complex Multi-Factor Incidents

Addresses investigations involving multiple locations, contractors, and interacting systems. Complexity management prevents evidence gaps and analytical oversimplification.

Lesson 4 • Organisational Resistance and Politics

Equips investigators to navigate management pressure, defensiveness, and information withholding. Strategies protect investigation independence without escalating conflict.