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Floating Interval / Schedule

One of a variety of different types of intervals (time periods) between events.

In a maintenance strategy, this is a defined frequency for maintenance activities defined by performance criteria rather than by time measurements. Some of the performance criteria include:

Some of the fundamental asset management principles associated with the floating interval include:

A floating schedule results in new data determined by the inspection interval and the date the last inspection was completed.

A floating interval often applies to stochastic systems and predictive maintenance (PdM).

Listed below are some examples of floating (stochastic) intervals related to assets in a building: 

  • Perform motor service after 3,000 run hours
  • Inspect generator after power outages

Floating interval events along a planning horizon
Fig. Floating interval events along a planning horizon.



Fig. Floating interval events along the P-F curve.

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