Application Of Dmaic In Quality Improvement By Reducing Defects: A Case Study Of Scancom Vietnam

Abstract

This thesis focuses on the application of the DMAIC (Define, Measure, Analyze, Improve, Control) methodology in reducing defects and improving quality in the assembly process of Scancom Vietnam. The study utilizes data collected from September 2022 to March 2023, which revealed that the defect rate exceeded the acceptable limit of 1% for five months during this period. To address this issue, a thorough analysis was conducted, starting with the Pareto chart of failed components. The findings indicated that three main defect types required focused attention: Cracked (195 occurrences), Dented (74 occurrences), and Discoloration (45 occurrences). To understand the root causes of these defects, data on defect rate, failed components, and rework costs for the three defect types were collected and analyzed. Having identified the problem and root causes, the project aimed to find the most optimal solutions based on their effectiveness, implementation timeframe, and required human resources. The proposed solutions were reviewed and assessed by the process manager to determine the estimated results. As a result of the implemented measures, a reduction in defect rates for the three defect types was achieved: Cracked (0.36% to 0.29%), Dented (0.14% to 0.11%), and Discoloration (0.08% to 0.05%). Additionally, the thesis made suggestions for how to keep the enhanced process under control once it has been formally implemented in wood production.