Applying FTA and FMEA Techniques to Retread Tires Manufacturing Process Improvement

• Main Authors: Kai-Sheng Syue, 薛凱升
• Other Authors: Tai-Hung Yang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/qgmxur

碩士 === 國立虎尾科技大學 === 工業工程與管理研究所 === 103 === Due to the technological advancement in renewable tire repair in recent years, the life of retread tires has reached 80% that of new tires. These tires only cost about one third of the cost of new tires. Hence, they have gradually gained the trust of large truck and van users. However, frequent events of truck tire ungluing while traveling on freeways have led to increased customer complaints. Increased incidences of retread tire failure have resulted in great losses for the case factory due to compensation costs on customer complaints of tire failure that should not have even taken place in the first place. This study attempted to analyze failure events in tire retreading processes with high incidences through the use of two reliable analysis methods: the FTA and the FMEA, in order to explore factors contributing to possible failure during retreading processes and carry out improvement measures, thereby stabilizing repair processes and lowering the likelihood of customer complaints. Finally, an improvement strategy for reducing the risk of failure and recommendations were proposed. After improvement and re-assessment, the assessed risk coefficient of the failure-inducing factors in the processes reached up to 60.8%, while the extent of decrease for the remaining failure-inducing factors reached above 12.5%, thus indicating the two reliability analysis methods were indeed helpful in finding and improving failure events during retreading processes and ultimately achieving the purpose of reducing the probability of customer complaints over retreaded tires. This study shall serve as a reference for follow-up improvement processes to be carried out by the factory case study.