Abstract
In this paper, some preventive maintenance parameters in manufacturing firms were identified and used to develop cost based functions in terms of machine preventive maintenance. The proposed cost based model considers system’s reliability, cost of keeping spare parts inventory and lost earnings in deriving optimal maintenance interval. A case of a manufacturing firm in Nigeria was observed and the data was used to evaluate the model.
Highlights
The term maintenance can be defined as all actions appropriate for retaining an item/part/equipment in, or restoring it to a satisfactory condition [1]
This minimum point for the total maintenance cost at 100 percent inventory cost consideration (i.e I=1) is 1,349,105 Naira at tpm 173.58 for a planning horizon shown in Figure 1 for different percentage of inventory cost
SUMMARY AND CONCLUSION The maintenance records of an existing manufacturing firm reveals that a structured way of determining the preventive maintenance interval will help manufacturing companies to appropriate maximum benefits from application of preventive maintenance policy
Summary
The term maintenance can be defined as all actions appropriate for retaining an item/part/equipment in, or restoring it to a satisfactory condition [1]. Maintenance includes the repair of broken equipment, the preservation of equipment conditions and the prevention of their failure, which reduces production losses and downtime and reduces environmental and associated safety hazards. Preventive maintenance tends to inspect, adjust, replace, lubricates etc the machine components to avoid any likely failure. This involves the usage of consumables and spare parts. The spare parts involved in this activity need to be planned for and well managed to avoid shortages and unnecessary tying down of capital. Failure to make proper planning on the spare parts inventory has led to disrupted or poor maintenance operations resulting in economic loss for many organizations
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