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1. OBJECTIVES, FUNCTIONS, TYPES AND ECONOMICS OF MAINTENANCE
MAINTENANCE OBJECTIVES:
The objectives of maintenance are to ensure the desired plant availability at an optimum cost within the safety prescription. In otherwords, it may be mentioned that the objective of maintenance is to minimise the total cost of unavailability and resources.
Whenever the plant is not available either due to breakdowns or due to planned stoppages, the following costs are incurred.
1) Loss of earnings due to stoppage of equipment
2) Loss of in service materials.
In addition the following costs are incurred on resources:
1) Labour of overhead expenses
2) Materials in spares and consumables
3) Cost of storage of spares and facilities.
Hence, maintenance functions are so, organised as to minimise the total cost of unavailability and resources.
MAINTENANCE FUNCTIONS:
The above mentioned objectives are attained by taking certain action illustrated below:
Action
Purpose
a. Lubrication
b. Cleaning
c. Adjustments
Return or slow down the process of deterioration or wear
d. Application of
Protective coatings
e. Examination of the Assess the extent of wear and state of the determine, on that basis, the components action required to check a break-down and the time when
f. Analysis of history such action should be taken of behaviour of the machine and its components g. Replacement of worn out component
1
h. Repair of cracks or other repairable damages Restore the original operational capacity of the machine and prevent further damage
i. Modification of design of the components or location of the equipment. Affect improvements to reduce the frequency of attention or to reduce cost of maintaining the equipment
j. Capital replacement
Replacement of the machine when the age of the existing machine requirements of quality and quantity of output and emergence of better machines make it economical to dislodge the present
MAINTENANCE OBJECTIVES:
The objectives of maintenance are to ensure the desired plant availability at an optimum cost within the safety prescription. In otherwords, it may be mentioned that the objective of maintenance is to minimise the total cost of unavailability and resources.
Whenever the plant is not available either due to breakdowns or due to planned stoppages, the following costs are incurred.
1) Loss of earnings due to stoppage of equipment
2) Loss of in service materials.
In addition the following costs are incurred on resources:
1) Labour of overhead expenses
2) Materials in spares and consumables
3) Cost of storage of spares and facilities.
Hence, maintenance functions are so, organised as to minimise the total cost of unavailability and resources.
MAINTENANCE FUNCTIONS:
The above mentioned objectives are attained by taking certain action illustrated below:
Action
Purpose
a. Lubrication
b. Cleaning
c. Adjustments
Return or slow down the process of deterioration or wear
d. Application of
Protective coatings
e. Examination of the Assess the extent of wear and state of the determine, on that basis, the components action required to check a break-down and the time when
f. Analysis of history such action should be taken of behaviour of the machine and its components g. Replacement of worn out component
1
h. Repair of cracks or other repairable damages Restore the original operational capacity of the machine and prevent further damage
i. Modification of design of the components or location of the equipment. Affect improvements to reduce the frequency of attention or to reduce cost of maintaining the equipment
j. Capital replacement
Replacement of the machine when the age of the existing machine requirements of quality and quantity of output and emergence of better machines make it economical to dislodge the present