What is a shutdown or turnaround?

The planned stop where months of deferred work happen at once.

A shutdown (or turnaround/outage) is a planned full stop of a line or plant to execute work that can't run alongside production — overhauls, statutory inspections, capital tie-ins. Scope is frozen weeks ahead and every job is sequenced.

Shutdown scope is fed by the backlog and condition findings all year. Cost and duration overruns usually trace to scope creep and discovered work — which is why the discovery loop matters.

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