MAINTENANCE:
Choice of the suitable maintenance practice can be from the following six types:

1. CAPITAL REPLACEMENT:
A replacement may have to be affected when-

? An equipment ages to the extent that the cost of maintaining in the
required condition provide gain that is less than those realizable from investments in anew unit.
? Changes the quality & quality of the product & / or emergency better
m/c in the market render the original unit obsolete. Process of discarding old equipment & installing a new one in its place is a continuous feature of an industry because of its dynamic nature that is reflected through the improvements in product quality, increase in the volume of sales, general technology development & deterioration of the existing equipment. Maintenance department of a company has therefore, to assume the responsibility for evolving a long-range replacement policy commensurate with the company’s objectives & growth.

2. STAND-BY CAPACITY:
Stand by capacity is often provided for items of equipment that we are critical to production. It is sometimes an economical maintenance practice to install such capacity to be put into operation while the original unit is under repair or is over-hauled.
Production in this situation is held u only for the period of time required to switch over from one m/c to the other m/c. A stand by, however, uses up capital. Decisions to install another unit should therefore, be made after complete analysis of comparative costs.

3. BREAK-DOWN MAINTENANCE:
Break-down maintenance practice allows a m/c or facility to run without much of routine attention, till it actually, breaks down to be then put back into commission. Type: Gravity, place & time of break down area of random nature. This practice, therefore, leads to disruption of production planes. It also makes it impossible to plane the work load & distribution of maintenance work force for a balanced attention of all equipment. It increases over time payment & involves prolonged down time due to non-availability of requisite man-power & spares. This practice, consequently, accepts a low level of organizational efficiency, & can not be recommended as general practice for all types of equipment.

It is, however, an economical way of maintaining certain non-critical items whose repair & down time costs are less this way than with any other system of maintenance.

4. SCHEDULED MAINTENANCE:
Schedule maintenance system provides for inspection, overhaul lubrication, & servicing of certain m/c at predetermined dates. Overhauling of m/cs, cleaning of tanks & white washing of buildings is normally done in this manner. This type of maintenance is therefore practiced to a certain extent, even in those companies where break down maintenance is otherwise a rule. Pre-determination of date of commencement of work ensure comparatively better allocation of manpower keeping in view the requirements of production & other activities of the maintenance crew. Mere scheduling how ever is not sufficient. It can not ensure completion of work in time because the nature & details of worked required to be done remain unknown. It, consequently leads to an increased down time due to non availability of requisite skills & materials. Allocated manpower may for the some reason also remain under utilized.

5. PLANNED MAINTENANCE:
Planned maintenance represents advancement over the above mentioned types of maintenance practices. Briefly stated, planned maintenance visualizes the work contained in a future job, determines the best method to be adopted & sills required for its execution, estimate the time, material & cost involved assigning jobs of individuals, programs the work to specific times periods on the basis of priority & after ascertaining production requirement, & arranges for availability of material tools & manpower & for release of m/c in time. Planned maintenance also provide for system of feed of information for necessary changes in the original plan.

6. PREVENTIVE MAINTENANCE:
Preventive maintenance refers to only a part of good maintenance programmed. It consists of routine actions taken in a planned manner to prevent break-down & to ensure operation accuracy to the extent it is economically & practically possible to do so. Lubrication & inspection are the two constituents of preventing maintenance. Lubrication insures long life & safe working of equipment without mishaps. Inspection tries to detect faults in a equipment & facility so the repairs & replacement may be undertaken before the faults assume the proportion & shape of a break down.

SHASHSA DENIMS follows all types of maintenance those described above.