An educational library of workplace documents — purpose, who completes them, when they are used, typical fields, common mistakes and how they connect. Linked to workplace safety, workplace training, occupations, industries and employment documents. Informational only — template examples, not legal advice or official documents; employers remain responsible and using a document does not guarantee compliance.
What an incident investigation report is
An incident investigation report documents a structured look at what happened, why it happened and what should change. It moves beyond the initial report of facts to establish contributing factors and underlying causes.
This is an educational overview with a simplified example. It is not an official template, and it does not determine the standard of investigation required — that depends on the severity of the event and the applicable law.
Purpose
- Establish the facts of what happened beyond the initial report.
- Identify the immediate, contributing and underlying causes.
- Recommend corrective actions to prevent a recurrence.
- Capture lessons and feed them back into the safety process.
Who completes it
- A competent investigator appointed by the employer — proportionate to the severity.
- With input from those involved, witnesses and, where needed, technical experts.
- Independent of those directly responsible for the area, where practicable.
- The employer decides who investigates and how the report is approved.
When it is used
- After an accident, injury, near miss or dangerous occurrence that warrants investigation.
- When an initial report reveals causes worth examining in depth.
- When a pattern of incidents suggests a systemic issue.
- When the employer’s process or the applicable law calls for an investigation.
Typical fields
- Reference to the originating report, date and the investigator.
- A factual account of the sequence of events.
- Immediate, contributing and underlying (root) causes.
- Evidence considered — statements, photos, records.
- Recommended corrective actions, owners and review dates.
- Example fields only — adapt to the severity and the applicable law.
Common mistakes
- Stopping at the immediate cause and missing the underlying ones.
- Apportioning blame instead of understanding the system that allowed it.
- Recommending actions that are vague or never followed up.
- Investigating so late that evidence and recollection are lost.
Document workflow
The investigation report follows an accident report, near miss report or dangerous occurrence report, and draws on witness statements and a root cause analysis form. Its recommendations are typically completed through corrective action forms, and findings drive a review of the relevant risk assessment, instruction and any register.
See the related documents below for what is commonly required before, used with and completed after an incident investigation report.
Retention (high level)
Investigation records are usually kept for a period set by the applicable law and the employer’s data-protection duties, and may need to be retained for a long time for serious events. This page does not state a period — confirm with the applicable law and the official authority.
Completing and sharing as a PDF
Investigation reports are commonly completed and stored as PDFs, with statements and evidence attached, so the full record can be reviewed and retained. Exporting to PDF supports the record; it does not make the investigation official or guarantee compliance.
Employer checklist
- Match the depth of investigation to the severity and potential of the event.
- Use a competent, sufficiently independent investigator.
- Look for underlying causes, not just the immediate trigger.
- Track recommended actions through to completion.
Worker notes
- Cooperate honestly with the investigation and share what you saw.
- Understand the aim is to prevent recurrence, not to assign blame.
- Help check that recommended actions are workable.
Country considerations
Expectations for investigating workplace incidents, and any duty to investigate, vary by country, and the official authority differs. This page is general and high-level — not a statement of any country’s law and not legal advice.
Confirm investigation requirements with the official authority for your country and a qualified professional.
Who is responsible
The employer is responsible for ensuring incidents are investigated proportionately, that causes are addressed and that recommended actions are completed, and for compliance. This page is an educational overview with a template example; it does not determine your investigation duties or transfer responsibility.
Export, edit and share documents
The documents, policies and templates this involves can be exported, edited, signed, stored and shared as PDFs with the HELPERG PDF Editor.
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