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Independent Cycles
In generic terms, the actions and events in one cycle ("A") are not directly affected by the actions and events within another cycle ("B").

Cycles
contemplate three types of relationships between tasks and assets as follows:
  • The maintenance tasks associated with a single asset.
  • The renewal of the many components of a single asset.
  • The assets of a single system or multiple systems.


Attributes
With respect to the renewal of assets and major maintenance activities, independent cycles have the following general attributes:

  • The cycles do not generally intersect and therefore run independently
  • There are generally few opportunities for bundling of events.
  • There are no economies of scale to be leveraged through coordination of the independent cycles. 
  • Independent cycles are most common within the mechanical system and the electrical system, which contains packaged and terminal devices that can be treated independently.

Examples
Included below are some examples of independent cycles to help illustrate the concept:
  • Our three boilers are of different ages and they will therefore be replaced at different times. Their replacements are not dependent on one another.
  • The swap out of components of our cooling tower occurs on a cycle that is different from the repainting of the tower structure. The activities require different skill sets are not done by the same contractor.
Two cycles of activity ("A" and "B") that do not intersect and run independently of one another.
Fig. An example of two independent cycles of activity ("A" and "B") that do not intersect and run independently of one another.


water heaters
Fig. When one of the domestic water heaters is replaced, the other water heaters do not necessarily need to be replaced at the same time.


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Fig. Bar chart to illustrate the independency between the varied activities.

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