Review a construction JHA after the scope changes
A job hazard analysis (JHA) describes work steps, hazards and controls for a planned task. When the scope changes, a JHA that was accurate at the morning meeting can become misleading. A different material, access route, subcontractor or work sequence may create a new exposure. The review should happen before the altered step, not after the crew has improvised a method.
This guide addresses the change-control review of a JHA on a US construction project. OSHA's Job Hazard Analysis worksheet says to review a JHA when the job changes or an injury or illness occurs. A JHA is a planning tool; it does not replace any task-specific OSHA standard, permit, competent-person inspection or state-plan requirement. Check the worksite jurisdiction and applicable standard for the actual activity.
State the original and revised scope
Record the approved task, location, crew, equipment and sequence. Then describe precisely what changed. “Additional work” is too vague. Did the crew move from interior demolition to a roof, change the lift method, discover an energized line or add another trade to the work area? Note who requested the change and when the field team learned of it. Keep the original JHA as history.
The supervisor should determine which steps are affected. A change in one step may alter traffic, access, fall exposure or emergency response for other steps. Ask workers who perform the task, not only the estimator who wrote the original plan. The people doing the work can identify practical constraints that are invisible in an office review.
Reassess hazards and controls
For each affected step, identify the hazard, people exposed, severity and feasible controls. OSHA's worksheet recommends selecting controls through the hierarchy of controls and reviewing them with workers after installation. A revised JHA should show the new control and how it will be used, not simply add another warning line. If a control is unavailable, pause the affected work and find a workable alternative.
Review interfaces: other trades, occupied premises, deliveries, public areas and plant operations. If the change affects a lift plan, excavation, electrical isolation or other regulated task, involve the competent person or specialist required by that standard. A JHA review is not permission to bypass a separate legal or technical approval.
Update related documents and decisions
A changed task may require a new permit, traffic plan, equipment inspection, material safety information or subcontractor coordination. Link those records to the JHA revision. If the project uses a daily pre-task plan, update it so the crew sees one coherent method. Avoid a situation where the JHA says one thing while a current permit or drawing says another.
Identify who can approve the changed method. A remote project manager may approve commercial scope, while the site supervisor or competent person must decide whether the field controls are in place. Record both decisions if needed. Do not mark the JHA “approved” because a customer signed a variation order.
Brief the crew and check understanding
Tell affected workers what changed, which hazards are new, the controls and the stop-work triggers. Include replacement workers and subcontractors. Ask a worker to explain the changed sequence where the risk is significant. Attendance is useful evidence of a briefing, but it is not proof that the controls exist or that everyone understood. Confirm the workface matches the revised plan before restarting.
If the change arrives during a shift, distinguish the point at which original work stopped from the point at which revised work began. A revision timestamp and briefing record help explain which plan applied. Preserve older versions rather than silently replacing the file that was in use earlier.
Example: an unplanned overhead service
A crew plans to install ductwork using a mobile lift. During access preparation, it finds an overhead service not shown on the plan. The supervisor stops the affected installation step, identifies the service with the appropriate people, reviews access and isolation, and revises the JHA and any related lift or permit documents. The workers and adjacent trade are briefed before work resumes. The record shows the discovery, new control and start decision. A note saying “be careful of overhead service” would not be a sufficient method review.
Review the revised method in use
After work restarts, observe whether the controls are practical and being followed. OSHA's JHA worksheet recommends continued monitoring rather than assuming a control works because it was selected. If workers have to bypass it to perform the task, stop and rework the plan. The JHA is a living work-planning record, not a shield against later change.
The mapped Complys US construction page is the broader commercial context for project records. Verify current product functions directly. This guide does not claim Complys validates a JHA, approves high-risk work or determines OSHA compliance.
Record the decision to stop or restart
When scope changes, the useful evidence is the decision made before the new work begins. Record what changed, who identified it, which hazards are new, who reviewed the job hazard analysis and which crew members received the revised briefing. If a permit or subcontractor interface is affected, capture that connection. A revised file saved after the task is over cannot show that workers used it at the right time.
The restart check should be practical: tools, access, sequence, exclusion zones and emergency arrangements still match the analysed job. Ask at least one worker to explain the new control in their own words. If they cannot, repeat the briefing or change the method. Keep the prior JHA and the revised version so a later reviewer can see why the work changed.