Page 48 - Machinery Component Maintenance

Maintenance Organization and Control for Multi-Plant Corporations 33

formed on a planned basis, actual plant startup delays due to the central
stocking depot concept are rare.
By careful analysis on ordering of initial spares and the central depot
concept, major corporations have been able to lower the investment in
spares (expressed as a percentage of equipment investment) from approx-
imately 5 % a few years back to under 3 % on new plants.
To keep the administration of replacement spare parts at a minimum
cost, a central data processing system has been established. The spare
parts inventory replenishment system installed at each facility consists of
prepunched cards for each part. As parts are used, cards are sent to the
corporate office for computer input, which automatically generates the
parts replacement purchase order. The authorized parts level is periodi-
cally reviewed to prevent reordering of parts with a low turnover. A
block diagram showing the spare parts support system is shown in Figure
2-6. A composite listing of all parts in the system is available at the cor-
porate office to facilitate the identification of parts interchangeable with
other facilities.

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Figure 2-6. Block diagram of operations spare parts support system.