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Product design is the important period of product developing, it is the key point of the whole process. Design process is the key point of quality control. QFD, DOE, Robust design, Reliability Analysis, DFX etc. are all effective quality tools. These tools can all be used in the design phase. Find the effective way to integrate these quality tools, to control and design the quality in the design phase, those will help to give the good quality, cost, performance and reliability in the product concept phase, those will also give the powerful life to the product and reduce the possibility of engineering change, then those will save the resource what ever for company or for society.This subject is mainly facing to the issues which are generated in design, to ensure the design quality of products, research that how to use the quality tools during seatbelt design phase, each tool is independent but could work together and make the function better.The research items of this subject are as following:1. Define the design direction by QFD tool, to ensure the design direction of seatbelt is correct when start to design.2. Acknowledge the main characters by DOE tool, to ensure the main characters have been designed and optimized. Confirm the tolerance of each main character by Robust Design tool, to consider the necessity of tolerance from economic point of view. Start the failure deployment and logic analysis by Reliability Analysis tool, to analyze the risk of failure mode priorities and continuous improvement through FMEA, to guide the design and improvement, to reduce the product problems in latter production.3. Analyze the constrains of follow-up process of the seatbelt product by DFX tool, feedback the manufacture etc. information (including manufacture , Assembling, cost etc.) as the input into design phase, fundamentally reduce the testing, manufacturing process design changes, reduce the difficulty of product technology and production costs , then improve the product testing , manufacturing, assembly, and economy and so on.
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