Built for Singapore's Workplace Safety and Health Act.
Enforces WSH Act compliance physically, with full audit traceability, not just paperwork. A partnership between Symple and LOTOBOX, built for Singapore's process and manufacturing sites.
Regulators are watching LOTO more closely than ever.
Sources: ILO, “A Call for Safer and Healthier Working Environments” (2023); Ministry of Manpower, Singapore, Workplace Safety and Health National Statistics.
Analog LOTO relies entirely on human vigilance.
Unsafe tool access before isolation
Technicians can reach live equipment before it's actually isolated, a direct path to serious injury.
Bypassed steps, no full record
Paper checklists rely on memory. When a step is skipped, there's no end-to-end record to catch it.
Uncontrolled key access
Lost or duplicated keys mean anyone can open what should be locked, undermining the point of lockout.
At the Singapore Refining Company's Jurong Island plant, a supervisor issued a work permit for pipeline bolt-tightening without first confirming the lines were properly isolated. The resulting release of hydrogen sulfide and other hazardous material caused fatal chemical burns and organ failure in one worker, and injured two others. The supervisor was later convicted of a negligent act under Singapore's Workplace Safety and Health Act. (Singapore courts, 2023)
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What if the system enforced it, instead of reminding people to?
This system enforces compliance physically, not just records it.
The wrong key simply cannot be removed from the cabinet.
Three components.
One enforced procedure.
Symple
Issues LOTO-based work orders, manages permits, and logs every step, consistent, traceable, and audit-ready from start to finish.
LOTOBOX
A secure, connected cabinet that locks each padlock and key in a fixed position. Technicians can only remove what they're authorised for.
Your LOTO Procedure
Defines each work order and controls which keys release at every step, fully integrated, and it scales from one site to hundreds.
Proof it's enforced, not just tracked.
Wrong key stays locked
Everything except the technician's authorised key remains physically locked, no override.
Green light confirms return
Returning a key to the correct slot triggers a real-time green light, visible, verifiable confirmation.
New work order required
Once a job closes, the cabinet re-locks itself. Reopening it requires a fresh, authorised work order.
Every step, enforced in order.
LOTOBOX's 12-action breakdown of OSHA 29 CFR 1910.147, the 6-step Control of Hazardous Energy standard, run two different ways. This is an example of how LOTOBOX can be applied to strengthen lockout/tagout enforcement.
Before Work Starts
Preparation & access control
- Work order issued in Symple; keys auto-allocated
- Access authorised in the LOTOBOX
- Technician retrieves the correct padlock(s) from the LOTOBOX
- Equipment fully isolated; padlock key(s) returned
- Permit to work issued
During Work
Isolation enforcement
- Work proceeds under the active permit
- Every action recorded automatically in Symple
After Completion
Deisolation & closeout
- Padlock key(s) collected from LOTOBOX and padlock(s) unlocked and removed except the padlock for power isolation
- Supervisor unlocks and removes padlock for power isolation
- Supervisor performs safety inspection
- Equipment test-run and verified safe
- Padlock(s) and key(s) returned to the LOTOBOX
- Permit closed; work order signed off
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