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Defect Reduction of Door Mirror Adjustment |
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| รหัสดีโอไอ | |
| Creator | 1. Jirayu Prapaanantachai 2. Jeerapat Ngaoprasertwong |
| Title | Defect Reduction of Door Mirror Adjustment |
| Publisher | Faculty of Engineering, Khon Kaen Univeristy |
| Publication Year | 2553 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 37 |
| Journal No. | 1 |
| Page no. | 1-8 |
| Keyword | QC 7 Tools, Six Sigma |
| ISSN | 0125-8273 |
| Abstract | The objective of this thesis is to study about defect reduction of door mirror adjustment for door mirror factory. Production process is receiving parts from supplier and production by ourselves. After that, parts will bring to assemble to finish goods. Then we deliver them to customer. The data collection of before improvement was conducted 1 year that was from January X December 2008. This data was inhouse defect and customer claim from quality control department. There were total inhouse defect 5,033 pieces that was total average repair cost 229,821 baht. These were A model 4,686 pieces which was average repair cost 213,213 baht and total customer claim 4,154 pieces which was total average repair cost 4,136,140 baht. These were A model 4,000 pieces which was average repair cost 3,982,000 baht. This model incurred the largest total average cost that was calculated to 90.09% From raw data, researcher chose model and problem that was the most effect to company. After that, analysis for finding root cause of occurrence and outflow including project of improvement by using QC 7 Tools and Six Sigma including, project of improvement and prevention as follow : 1) Purchasing new injection machine 2) Making new mold 3) Issue Xbar X R Chart, Inspection Data Sheet and equipment and machine check sheet documents After implementation of improvement project, the defect data was collected for 3 months from October X December 2009. The total defect was reduced to 7,298 pieces that was total average repair cost 3,504,588 baht or about 83.54% that we expect to achieve the target at 4 ppm. |
