Safety Inspection, Audit, and Incident Investigation
Distinctions
An inspection is a routine compliance check of the workplace, often using a checklist. An audit is a systematic, independent, documented evaluation of the management system, using sampling and criteria. An incident investigation examines what happened, why it happened, and what will prevent recurrence.
Investigation method
Secure the scene and preserve evidence. Interview witnesses separately, build a timeline, and distinguish immediate causes from root causes. Use 5 Whys or a fishbone diagram. Identify contributing factors such as equipment, procedures, training, supervision, and design. Recommend corrective actions with owners and due dates, then verify completion. Apply a just-culture approach: focus on system failures, not blame.
Records
Keep inspection findings, audit reports, investigation reports, corrective actions, and follow-up evidence. Track actions to closure.
Worked example
A worker slips on oil. The immediate cause is oil on the floor. The root cause may be a leak with no spill-response routine and no scheduled inspection. Corrective actions include fixing the leak, providing spill kits, adding inspection points, and training. A report that only says “worker was careless” fails the investigation.
Traps that cost marks
Blaming the worker, stopping at the immediate cause, failing to track corrective actions, and treating an inspection as an audit are common mistakes. Do not close an investigation without verifying effectiveness.