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How do you create a safe system of work?

Quick answer

Build the safe system from the assessed task: people, equipment, work sequence, controls, responsibilities and checks. Involve those doing the work, define when to stop and escalate, and verify that the method works. A document alone does not make the task safe.

Why a risk assessment needs an implemented method

An assessment may identify a dangerous restart or a conflict between maintenance and production. People still need to know who controls the equipment and how the job will proceed safely. HSE’s procedure-design guidance connects risk findings, competent people and usable instructions.

Do not rely on a written instruction where a physical or engineering control is needed. The method and the work conditions must support each other.

Distinguish the assessment, method and wider system

Distinguish the assessment, method and wider system
Element Main question Practical output
Risk assessment What could harm people and what controls are needed? Relevant findings and control decisions.
Method statement or task instruction How will the task proceed using those controls? A clear work sequence and limits.
Safe system of work How will people, equipment and arrangements keep the method effective? Competence, responsibilities, coordination, controls and verification.

HSE’s risk-management steps and procedure guidance explain the connection. Not every task needs a separate lengthy method-statement document.

Write the decisions people need at each stage

  • Before work: task scope, authorised people, equipment, access and necessary preparation.
  • During work: the sequence, controls, coordination and supervision.
  • Stop conditions: defects, changed circumstances or limits requiring escalation.
  • Completion: inspection, handback, communication and any authorised return to service.

Use language and a format suited to the task and users. Walk through the job with them, resolve unrealistic steps and check understanding through practice where appropriate.

Worked example: maintenance before food-premises opening

A business plans equipment maintenance before service. The manager coordinates access with the competent maintainer, confirms the work scope and arranges the relevant isolation through the approved system. Nearby staff know the equipment is unavailable.

Worked example: maintenance before food-premises opening
Stage Responsibility and evidence
Preparation Manager and maintainer agree scope, affected people and controls.
Work Competent maintainer follows the authorised method; changes are escalated.
Handback Required checks and reinstatement are confirmed by the appropriate people.
Restart The responsible manager communicates release and completes other relevant opening checks.

HSE’s maintenance guidance stresses planning, competence and safe systems, particularly where maintenance and production could overlap. This example is not an isolation or repair tutorial.

Check use and review after change

Observe whether the method is followed and whether it controls the risk. Investigate workarounds: the instruction may be unclear, resources unavailable or the planned sequence impractical. Update the system after relevant changes or evidence of failure.

For NI maintenance duties, use HSENI’s maintenance guidance and the correct framework.

Common mistakes

  • Copying a contractor’s generic method without checking the site.
  • Listing PPE while omitting the actual work sequence.
  • Giving everyone responsibility without a clear decision owner.
  • Releasing equipment without an agreed handback.

Next steps

Choose one non-routine task and walk the method with the people involved. Record the responsibilities, control checks and handback decision, then verify the arrangement during the next planned job.

Relevant next resource

Yellow Level 3 Health & Safety in the Workplace online-course cover.

Level 3 Health & Safety in the Workplace

The current Level 3 Health and Safety course explicitly covers safe systems of work, risk assessment and management responsibilities.

From £43.50 GBP

Currently unavailable

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