Sparesplanning Page189 of 544
Option11C and 11C Mini TechnicalReference Guide
Figure 18
Centralized depot service
Actual turnaround periods will vary in the field.
Population range: the population range is the quantity of each type of
Meridian 1 switch in the area served by the depot.
Spare stock size: the spare stock size for a given item depends on the sparing
interval, stock confidence level, failure rate, turnaround time for repair, and
population range.
Calculating spares requirements
The quantity of a replaceable item that is required to stock a depot for one
year can be calculated using a formula:
N x F x T
The spares planning formula has the following components:
N — The number of a spar es item in use.
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