备件缺货成本，即缺货所产生的损失。如备件的缺货对生产造成的潜在成本超过

The cost of spare parts out of stock is the loss caused by the out of stock. If the potential cost to production caused by the shortage of spare parts exceeds the purchase cost of the spare part, the shortage cost is defined as high. If the shortage cost of the spare part does not exceed the purchase cost of the spare part, the shortage cost is defined as low. The level of out-of-stock cost is the basic condition for determining the criticality of spare parts. The higher the out-of-stock cost, the more critical the spare parts. The details are shown in Table 4.1 below

The cost of spare parts out of stock, i.e. losses resulting from out-of-stock. If the potential cost of spare parts is greater than the acquisition cost of spare parts, it is defined as the high cost of out-of-stock, such as the low cost of out-of-stock for spare parts, where the cost of out-of-stock does not exceed the acquisition cost of spare parts. The cost of out-of-stock is the basic condition of the key determination of spare parts, the high cost of out-of-stock, the more critical the spare parts. As shown in Table 4.1 below.

The cost of spare parts shortage is the loss caused by shortage. If the potential cost caused by the shortage of spare parts exceeds the purchase cost of spare parts, the shortage cost is defined as high. If the out of stock cost of spare parts does not exceed the purchase cost of spare parts, the shortage cost is defined as low. The level of shortage cost is the basic condition to determine the criticality of spare parts. The details are shown in table 4.1<br>