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Simulated workplace
Scenario · WHS, Quality and Environment

Investigate the trestle near miss at the library refurbishment

You are the WHS Coordinator reporting to the WHS and Quality Manager.

Advanced3 to 4 hours7 tasks
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The situation

What has happened

At the Southern Schools library refurbishment a subcontract ceiling installer working from a trestle without a handrail lost his balance and stepped down onto a stack of carpet tiles. He was not hurt, but the ceiling grid is 2.7 metres above the floor and the work was being done from an unprotected platform. The WHS and Quality Manager has opened the event in the WHS register, stopped trestle work on the site and asked you to investigate. The subcontractor's SWMS for ceiling installation is on file but was signed three weeks ago by a different crew. The site diary shows the principal has been pressing for weekend work to finish before term four. Your report is due on 18 September.

Your brief. Investigate the near miss, identify the immediate and underlying causes, check whether the SWMS and the site controls were in force, and recommend corrective actions in hierarchy order with owners and dates, then update the register so the event can be closed by the WHS committee.
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Tasks

Deliverables

  • Investigation report with causes and evidence
  • Corrective action list with owners and dates
  • Updated WHS register entry
  • Draft toolbox talk record

Documents to use

Systems to use

WHS Incident and Hazard Register

The register of injuries, near misses, hazards, environmental incidents and corrective actions across every Keystone site.

Site Diary and Job Register

The daily record for each construction project: weather, workers on site, work done, deliveries, inspections, delays and instructions.

Licences and Training Matrix

Tracks every worker's licences, high-risk work tickets, inductions and training with expiry dates so only qualified people do licensed work.

For trainers and assessors

Units of competency

Current on training.gov.au for the Construction, Plumbing and Services Training Package as at 10 September 2026.

CPCCBC4002Manage work health and safety in the building and construction workplace
CPCCBC4008Supervise site communication and administration processes for building and construction projects
CPCCWHS2001Apply WHS requirements, policies and procedures in the construction industry
CPCPCM4011Carry out work-based risk control processes

Qualifications

CPC40120Certificate IV in Building and Construction
CPC50220Diploma of Building and Construction (Building)
Assessor notes

What to look for

Evidence guide

The report must separate facts from opinion, identify that the SWMS was not current for the crew doing the work, name schedule pressure as a contributing factor and put engineering controls such as a platform ladder or mobile scaffold ahead of administrative controls. Check the notifiability reasoning and that the register entry is updated with owners and dates.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.