DETERMINING PREVENTIVE MAINTENANCE SCHEDULING OF TIRE BUILDING MACHINE IN PT. ABC

Abstract

Maintenance activity is one of the most important and critical matter during production process in the company. PT. ABC as one of tire manufacturer currently deals with problem regarding to reliability in Tire Building Machine. Tire Building Machine (TBM) is required to be always in a good condition over the time since TBM is one of the critical machine in producing tire. Machine breakdown in TBM Samson 1 contributes to the stoppage of producing green tire. Therefore this condition will make the company gain more losses especially in cost due to the breakdown and green tire shortage. The stages of this researches begins by determining the critical machine and determining the most critical components using Pareto chart. After that probability densitiy function, cummulative density function, reliability function and failure distribution are needed in order to determine the maintenance interval time. This research will contribute to give suggestion and recommendation for the company due preventive maintenance schedule in order to increase the reliability in TBM and reduce maintenance cost. The company was given three scenario based on the desired realibility in TBM. PT. ABC has a full right to choose which scenario fits with the condition. By implementing the first scenario (65% of reliability), the reliability of TBM Samson 1 increases 22.34% and can reduces cost as much as 60.19% from the current cost. In the second scenario (75% of reliability), the reliability increases 32.34% and reduces cost 38.92% from current cost. The last scenario (85% of reliability), the reliability increases 42.34% and can reduces cost 16.65%.