Why it matters

An incident tells you where your controls failed. If you only fill in the form, the same gap stays open. The next person may not walk away.

Near misses carry the same warning at no cost. A dropped spanner that missed a head is a falling-object incident. Treat it as one. The WSH Council guide for SMEs says incidents without injury should still be investigated. It also notes that this helps shaken workers regain confidence.

The first hour

Stay calm. Check for danger before you rush in. Switch off the machine or isolate the power. Then help the injured person.

  • Give first aid. Call an ambulance if the injury is serious (995 in Singapore).
  • Stop work in the area. Cordon it off and keep people out.
  • Leave the scene as it is unless you must move something to save a life or stop further harm.
  • Write down the names of everyone who saw it.
  • Tell your safety officer or manager straight away.
  • Take photos from several angles before anything is moved.
Keep a kit ready

The WSH Council suggests a ready-packed investigation kit. Put in barricade tape, a camera, a torch with spare batteries, a measuring tape, gloves, safety boots, and blank investigation forms.

What the rules require in Singapore

The Ministry of Manpower sets out what you must report. A work accident is reportable when the injured employee gets outpatient or hospitalisation leave, is put on light duty, or dies. Occupational diseases and listed dangerous occurrences are also reportable.

The employer reports injuries to its own employees. If a subcontractor hired the injured worker, the subcontractor files. The occupier reports dangerous occurrences. The occupier also reports deaths of self-employed people or members of the public at the workplace. See who should report.

  • Fatal accident: notify the Commissioner as soon as reasonably practicable. File the iReport within 10 days of the accident.
  • Non-fatal accident: file the iReport within 10 days of the employer first learning of it.
  • Injured worker later dies: notify the Commissioner immediately.
  • Dangerous occurrence: the occupier notifies the Commissioner and reports within 10 days.
  • Occupational disease: report within 10 days of receiving the diagnosis.
  • More medical leave given later: update the online report.
Legal requirement

Employers and occupiers must keep incident reports for 3 years. A late report must still be filed, with the reason it is late. Failing to report can bring a fine of up to $10,000 for a first offence. Repeat offenders face up to $20,000, up to 6 months in jail, or both. Sources: MOM: report a work-related accident and MOM: what and when to report.

Who should investigate

Pick a lead who can approve fixes. The WSH Council says the lead should be neutral and not from the team involved. For a bigger incident, form a small team. Include a worker, the supervisor and an engineer or safety officer.

The supervisor belongs on the team. You know the work and the area better than anyone. Insurers sometimes want to be told before you start, so check your policy. If MOM, SCDF or the police attend, follow their directions. You can run your own investigation alongside theirs.

Gather the facts

Record the scene before it changes. Note where tools and equipment sit. Look at lighting, the floor, housekeeping and the weather.

Interview people one at a time and in private. Start with the injured person if they are fit to talk. Ask open questions such as "Walk me through what you were doing." Listen. Do not blame anyone at this stage. People stop talking the moment they sense a hunt for a culprit.

  • Photos of the scene, equipment and any damage.
  • Statements from the injured person and each witness.
  • Safe work procedures, permits and risk assessments for the task.
  • Maintenance logs, inspection tags and training records.
  • Safety data sheets if chemicals were involved.
  • CCTV footage, if any, saved before it is overwritten.

Find the root cause

Write down what happened in plain order. Then mark each unsafe act and each unsafe condition. Compare what happened with what the procedure said should happen. The gaps are your leads.

Keep asking why. The WSH Council's ladder example shows the method. A technician missed a step and fell. Why? He turned his head and the ladder wobbled. Why did it wobble? The spreader was worn and a rung was damaged. Why? Nobody maintained the ladders. The root causes were missing training and no maintenance programme. "Worker was careless" would have fixed nothing.

Test your root cause

Ask one question. If you fix this, does the same incident become unlikely for a different worker on a different day? If not, keep digging.

Fix it and follow up

Choose fixes that close the gaps you found. Work down the order of controls. Remove the hazard if you can. Swap in something safer. Add guards or barriers. Change the procedure and train people. Use PPE as the last layer, not the first.

Give every action an owner and a due date. Get management to sign off. Tell the whole crew what changed and why. Check after a few weeks that the fix works and that people use it.

Review the risk assessment

Under regulation 7 of the WSH (Risk Management) Regulations, the employer, self-employed person and principal must review and revise the risk assessment when anyone suffers bodily injury from a workplace hazard. A significant change in work practice also triggers a review.

Common mistakes

  • Stopping at "human error". People make mistakes. Your system should catch them.
  • Clearing the scene before photos and measurements are taken.
  • Interviewing witnesses together. Their stories merge.
  • Missing the 10-day deadline because nobody knew who owned the iReport.
  • Treating near misses as luck instead of free warnings.
  • Writing actions nobody owns. "Be more careful" is not an action.
  • Never checking whether the fix was put in place.

In other countries

  • Malaysia: Under section 32 of Act 514, the employer must notify the nearest DOSH office of accidents, dangerous occurrences, occupational poisoning and occupational disease. The DOSH NADOPOD guidelines say deaths, serious bodily injury and dangerous occurrences go to DOSH immediately by the quickest means. A written report follows within seven working days. An accident that keeps a worker off work for more than four calendar days must also be reported within seven days, on the form DOSH specifies.

Use it on site: the incident reporting & investigation checklist and the toolbox talk to brief your crew.

Sources

  1. Work accident reporting: what and when to report, Ministry of Manpower.
  2. Work accident reporting: who should report, Ministry of Manpower.
  3. Report a work-related accident, Ministry of Manpower.
  4. WSH Guidelines: Investigating Workplace Incidents for SMEs, WSH Council.
  5. Workplace Safety and Health (Risk Management) Regulations, Singapore Statutes Online.
  6. When should my company review its risk assessment?, Ministry of Manpower.
  7. Occupational Safety and Health Act 1994 (Act 514), updated text to 1 June 2024, DOSH Malaysia.
  8. Guidelines on OSH (Notification of Accident, Dangerous Occurrence, Occupational Poisoning and Occupational Disease) Regulations 2004, DOSH Malaysia.

This is practical guidance, not legal advice. Laws and codes of practice change; always check the current official text and your site's own procedures.