Abstract:
The objective of this thesis was to reduce the defect proportion at a hard disk drive assembly company using Six Sigma approach divided into five steps including defining phase, measurement phase, analysis phase, improvement phase and control phase. The main purpose was to reduce the defect proportion of a broken connector housing from 5.16 percent to 3.23 percent. After analysis phase was conducted, the results obtained from the statistical analysis were four important factors including pattern of fixture inappropriate, fixture deteriorated, wrong handing process on Triton tester and wrong handing process on X-calible tester. The factors were improved in the process resulting in the defect proportion was reduced to 2.10 percent