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Condition Drift

The continual deterioration of a group of assets or a group of buildings which continues despite efforts made to retire the backlog of deferred maintenance (DM).


Causes
Listed below are some of the primary cause of condition drift within a portfolio:

  • The reinvestment levels are not adequate to match or extinguish the natural processes of deterioration.
  • The owners are intentionally running some of the buildings to failure for the purpose of eventual redevelopment rather than reinvestment.

Quantification
The extent of the condition drift is measured with an understanding of the following variables:


Methodology
The condition drift can be assessed with the following asset management tools:

Further discussion on each of these matrices can be found on their respective pages in this glossary.

Management Principles

The condition drift can be addressed through the following asset management principles:
Condition drift of certain facilities represented on a scatter plot.
Fig. Condition drift of certain facilities represented on a scatter plot with the Facility Condition Index (FCI) on the horizontal axis and the Mission Dependency Index (MDI) on the vertical axis.


A condition-age matrix comparing the status at base year and condition drift a few years late
Fig. A condition-age matrix comparing the status at base year and condition drift a few years later.


Sensitivity analysis testing the Projected FCI levels on two linear funding models.
Fig. Sensitivity analysis testing the Projected FCI (ie., backlog) levels on two linear funding models.

See also:

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Fig. Examples of deferred maintenance items that are included in the numerator of the FCI and EFCI formulas.

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