Preventive maintenance design to reduce work order volume using FMEA: A Case Study A System Development Company

Abstract

The objective of this study is to lower the average rate of ticket jamming orders at BTS automatic doors that restrict passengers from leaving the station. These issues were evaluated and prioritized for response utilizing the principles of failure and impact analysis, as well as risk prioritization. Prior to the upgrade, it was discovered that the preventive maintenance plan did not identify the details of the inspection methods for the sensors and rollers, which were the primary causes of ticket jamming issues. In addition, there was no firm deadline for the job. This study implemented a weekly preventive maintenance plan that required maintenance people to work at four to five stations per day. Personnel were assigned to inspect the sensors using visual control methods, as well as inspect the rollers at the screws that hold the upper and lower rollers, in accordance with the defined work processes. The findings revealed that the average rate of ticket jamming orders at automatic doors at BTS stations was lowered from 2.49 to 0.48 orders per day, or 80.72% of the orders. The remaining ticket jamming orders at automatic doors were the result of software faults.