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How to improve the strength in jackscrews by use of Six Sigma
2004 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Schefenacker Vision Systems Australia is a quality devoted company, they are aiming to reach the goal of Six Sigma quality. Some of the production lines are not yet there. Some quality problems need more urgent attention than others ie due to complaints from customers etc. SVSA is a world leading manufacturer of rear view mirrors and actuators, they work a lot with injection moulded parts, and they make most of the parts in house. The particular problem this thesis investigates is a problem that has had several customer concerns during the last years. Jackscrews heads has been breaking when the motormechanism are being assembled. This thesis is a Six Sigma project where a number of different statistical methods and tools are being used ie design of experiments and measurement system analysis. The purpose of the project has been to investigate if it is possible to improve the strength in jackscrews by use of Six Sigma and if it is worth it. This has been done by a optimisation of the particular moulding process. The improved machine settings is a result of several designed experiments and analysises.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Six Sigma, Design of Experiments, DOE, DMAIC
Keyword [sv]
URN: urn:nbn:se:ltu:diva-51370ISRN: LTU-EX--04/133--SELocal ID: 892fa0b1-d720-4270-a8ec-8ad397ed3d05OAI: diva2:1024731
Subject / course
Student thesis, at least 30 credits
Educational program
Ergonomic Design & Production Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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