Different companies and industries use shutdown, turnaround or outage for the same kind of event. Because every day offline costs production, they're planned for months and executed against hour-by-hour schedules with large temporary workforces.
Scope control is critical: work added late, or discovered when equipment is opened up, is the usual cause of overruns.
Related terms
Engineering, procurement and construction management
EPCMA delivery model where a firm provides engineering and procurement and manages construction on the owner's behalf, while the owner usually holds the construction contracts directly.
Look-ahead schedule
A short-term, detailed view of the next few weeks of work, taken from the main schedule and used to plan and clear constraints.
Critical path
The longest chain of dependent activities through a schedule.