Scheduling a shutdown job by the hour: the critical chain inside the outage window
A plant tie-in is planned inside a short outage. The contractor’s sheet shows one day of work, while operations needs to know when each handover occurs. Tools are ordered, but nobody has identified the decision that permits the next crew to enter.
Coordinate the shutdown in hours with the owner’s operations team and the people responsible for authorized releases. Separate work that can be prepared beforehand from the linked work inside the outage. Name crews, resources, handovers and decision points on one readable plan. This schedule organizes an approved operation; it does not provide an isolation procedure, authorize hazardous work or replace the owner’s return-to-service controls.
Make each handover visible before the outage
- Agree the window and boundaries. Confirm what operations means by outage start and return to service, including its release responsibilities. Record the affected equipment or area and the work scope so teams are not planning different boundaries.
- Move permitted preparation outside the window. Identify drawings, materials, prefabrication, access and tool checks that can be completed under the project’s approved arrangements. Keep preparation separate from work that requires an authorized shutdown or other control.
- Draw the linked hourly sequence. Show the agreed release, work, required checks and handovers with responsible people. Use time estimates supplied by the leads and flag assumptions, rather than dividing a day activity into arbitrary equal pieces.
- Confirm crews and resources at each handover. Name the lead for every shift or work stage and verify availability of required resources. Check conflicts with other operations and record where a crew remains dependent on another team’s confirmation.
- Set reporting and decision points. Agree when operations is told that a milestone is moving, who assesses the options and who authorizes any change. Include the responsible decision-makers and communication route on the plan.
- Walk the plan before the date. Review the sequence with operations and the relevant technical and safety leads. Record unresolved readiness items and their required completion dates; do not call a walkthrough an approval for conditions that remain unchecked.
Common mistakes
- Showing only a start and finish without the handovers between them.
- Assuming the owner’s release occurs automatically at the booked time.
- Hiding a moving milestone until the final completion forecast is missed.
Checklist
Before issuing the hourly plan
- Operations has confirmed the window and boundaries.
- Permitted preparation has named owners.
- Linked work and authorized releases are visible.
- Crew and resource availability is confirmed.
- Delay reporting and change decisions have named recipients.
Check your understanding
A forecast work stage finishes on time, but the required operations release has not been given. Should the next crew start?
