การลดของเสียสำหรับชิ้นส่วนอะไหล่ประตูยานยนต์

Abstract

The propose of this thesis is to analyze and reduce defect automotive door spare parts. There are tools failure modes and effect analysis by the assessment of the severity; detection and opportunity in select those faults. The result will come out in the type of risk priority number. This result will be a standard for choosing the cause of defect for the improvement. This thesis also presents a principle design and analysis of experiment, other quality tools and the controlling of statistic process to be the tool to improve reducing of defect on welding line which is found the most defects. After that the next process is to do risk priority number assessment after the improvement and compare the defect and the complaint from dealer before and after the improvement. The result of this thesis found that there is a reduction of complaint about the whole offset problem from JAPAN dealer compare with the sale’s amount from 0.66% to become 0.39%. Besides, the defect of welding process compare with the quantity of production is reducing from 4.37% to 2.83% and quantity of deform – door spare part’s amount compare with the production’s amount is reducing from 3.36% to 2.44%.