For smooth functioning of a plant it is deemed necessary that all the machines should be in working condition and should be safe to operate. To cater this objective necessity of Plant Maintenance arises. Plant Maintenance deals with Time based and Condition based maintenance.
Objectives of Plant Maintenance
- The objective of plant maintenance is to achieve minimum breakdown and to keep the plant in good working condition at the lowest possible cost.
- Machines and other facilities should be kept in such a condition which permits them to be used at their optimum (profit making) capacity without any interruption or hindrance.
- Helps to reduce the total maintenance cost of repair, preventive maintenance & inventory carrying a cost due to a spare part inventory.
- To reduce loss due to the production stoppage.
- To keep all productive assets in good working conditions.
- Improve the quality of the product and to improve productivity.
Importance of Plant Maintenance
- Optimum utilization of machinery and inputs for more production.
- Prevent and avoid loss of time and wastage of raw materials.
- Periodically checking and effectively managing tools and machines in the plant.
- This results in an immediate loss in productivity and a diminution of several thousand rupees per hour of output.
- An un-properly maintained or neglected plant will sooner or later require expensive and frequent repairs, because with the passage of time all machines or other facilities (such as transportation facilities), buildings, etc., wear out and need to be maintained to function properly.
Types of Planned maintenance
Basically four types of Planned Maintenance they are namely Preventive, Predictive, Corrective and Shutdown Maintenance.
- Preventive Maintenance: Preventive maintenance is maintenance that is regularly performed on a piece of equipment to lessen the likelihood of it failing. Preventive maintenance is performed while the equipment is still working, so that it does not break down unexpectedly.
- Predictive Maintenance: Predictive maintenance techniques are designed to help determine the condition of in-service equipment in order to predict when maintenance should be performed. This approach promises cost savings over routine or time-based preventive maintenance, because tasks are performed only when warranted.
- Corrective Maintenance: Corrective maintenance is a maintenance task performed to identify, isolate, and rectify a fault so that the failed equipment, machine, or system can be restored to an operational condition within the tolerances or limits established for in-service operations.
- Shutdown Maintenance: Shutdown maintenance is performed while equipment is not in use. Shutting down machinery can be costly, but sometimes due to the nature of the defective part/machine, shutdown maintenance is the only viable maintenance procedure.