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Phase Dispersion

The variability in age between the youngest phase and the oldest phase in a phased development.

There are essentially two classes of dispersion:
  • Narrow: If the variability is narrow (say 2-3 years) then it may be appropriate to average the age of all the phases and use this blended age for all phases.
  • Wide:  However, if there is a wide dispersion between the youngest and oldest phases (say 4-8 years) then it may be necessary to prepare a separate asset inventory for each phase 
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See also: