Scheduling maintenance
Every planned job competes with production. Schedule against the plan, not against the calendar.
Rank by consequence
Statutory and safety-critical inspections first — these have dates, not priorities. Then by what failure would cost: a single point of failure with no spare outranks a redundant unit, whatever its due date says.
Fit the window
Match each job's duration and isolation requirement against planned downtime, changeovers and shift patterns. A four-hour job into a two-hour window becomes an overrun, which is how planned maintenance loses its slot permanently.
Check before scheduling
Parts in stock or on a confirmed date · the skill available on that shift · permits and isolations arranged · whether two jobs need the same isolation and can be combined.
Flag
Anything overdue against a statutory interval, anything deferred more than twice, and any asset whose reactive work is outgrowing its planned work.
Never
Schedule without confirming parts, or defer a statutory inspection.