An Approach to Sparing Analysis for a Finite Working Item Population

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Authors
  1. Zhang, R.
  2. Asiedu, Y.
Corporate Authors
Defence R&D Canada - Centre for Operational Research and Analysis, Ottawa ON (CAN)
Abstract
METRIC-based sparing models assume that equipment failures are generated by an infinite working item population. These models were first developed and applied in the US military which maintains large fleets of specific platforms obscuring the errors introduced by this simplification. However, in countries like Canada where fleet sizes tend to be small, the errors introduced by this assumption can be significant. In order to deal with small (or finite) fleet sizes, the T-METRIC model is proposed. The model is based on the use of truncated distributions for calculating the expected backorder. It is shown that the T-METRIC model can provide more accurate EBO values than the VARI-METRIC model, especially when there are a small number of working items.

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Report Number
DRDC-CORA-TM-2013-249 — Technical Memorandum
Date of publication
01 Oct 2012
Number of Pages
42
DSTKIM No
CA042656
CANDIS No
803834
Format(s):
Electronic Document(PDF)

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