《Statistical Quality Control》课程教学课件（PPT讲稿）09 Quality fuction deployment

Qualityfunction deploymentIndustrial engineeringE-mail:cunrong_li@163.com2025/8/7

Quality function deployment Industrial engineering 2025/8/7 1 E-mail:cunrong_li@163.com

The origin and development ofquality function deploymentQuality Function Deployment(QFD) is amethod of quality assurance based on themaximum to meet customer reguirements inthe product development process ofSystematic and collaborative users.E-mail:cunrongli@163.com2025/8/7

The origin and development of quality function deployment Quality Function Deployment(QFD) is a method of quality assurance based on the maximum to meet customer requirements in the product development process of systematic and collaborative users. 2025/8/7 2 E-mail:cunrong_li@163.com

QFD,which was putforward byJapanesequality managementexpert YojiAkaoin the1960s,is a origin management theory thatsaw customers as guild.E-mail:cunrongli@163.com2025/8/7

QFD, which was put forward by Japanese quality management expert Yoji Akao in the 1960s, is a origin management theory that saw customers as guild. 2025/8/7 3 E-mail:cunrong_li@163.com

At present, the QFD has become the most popularresearch areas of quality assurance in the advancedtheproductionandmodeconcurrentCE)Engineering,engineering(Concurrentenvironment. It emphasizes that we are supposed toconsider the reguirements of uality assurance andquality assurance measures at the same time when westarted design the product.It is the most powerful toolin CE environment for Design For Quality (Design ForQuality,DFQ,it has a great help for the enterpriseto improve product quality, shorten the developmentcycle, reduce production cost and increase customersatisfaction.E-mail:cunrong_li@163.com2025/8/7

At present, the QFD has become the most popular research areas of quality assurance in the advanced production mode and the concurrent engineering(Concurrent Engineering, CE) environment. It emphasizes that we are supposed to consider the requirements of quality assurance and quality assurance measures at the same time when we started design the product.It is the most powerful tool in CE environment for Design For Quality (Design For Quality, DFQ)，it has a great help for the enterprise to improve product quality, shorten the development cycle, reduce production cost and increase customer satisfaction. 2025/8/7 4 E-mail:cunrong_li@163.com

Toyota usedthe QFD in7Os,and madegreateconomic benefits, its new product:Developmentcostsfellby61%oDevelopment cycle cut down a third,oThe quality of the product also gotcorresponding improvement.E-mail:cunrongli@163.com2025/8/7

Toyota used the QFD in 70s, and made great economic benefits, its new product: Development costs fell by 61%， Development cycle cut down a third， The quality of the product also got corresponding improvement. 2025/8/7 5 E-mail:cunrong_li@163.com

The world famous companiessuch as:Ford CompanyGM、ChryslerCorporation,Hewlett-Packard Development CompanyMcDonnell-Douglas CorporationXerox,NTT、adoptedQFDonebyoneE-mail:cunrong_li@163.com2025/8/7

The world famous companies, such as: Ford Company、 GM、 Chrysler Corporation、 Hewlett-Packard Development Company、 McDonnell-Douglas Corporation、 Xerox、 NTT、 adopted QFD one by one. 6 2025/8/7 E-mail:cunrong_li@163.com

In the fortyyears from the creation of QFDto nowits application has involved inautomobile,home appliances, clothingintegrated circuits, synthetic rubber,construction equipment, agriculturalmachinery, ships, automatic merchandisingsystems, software development,educationmedical and other fields.Thedevelopmentcycle↓3060%OCost12040%Numberofdesignchange140-60%E-mail:cunrong_li@163.com2025/8/7

In the forty years from the creation of QFD to now , its application has involved in automobile, home appliances, clothing, integrated circuits, synthetic rubber, construction equipment, agricultural machinery, ships, automatic merchandising systems, software development, education, medical and other fields. The development cycle 30—60% Cost 20—40% Number of design change 40—60% 2025/8/7 7 E-mail:cunrong_li@163.com

higher qualitytechnologylowercostdevelopmentproductdesignprocessthedesignproductionprocessfault1:1000quality1:1001:101:1repairE-mail:cunrongli@163.com2025/8/7

1:100 1:1 1:1000 1:10 2025/8/7 8 E-mail:cunrong_li@163.com technology development product design process design the production process fault repair quality higher quality lower cost

The principle of qualityfunction deploymentQualityfunction deploymentfollow theprinciple of concurrent engineering.Aftermaking key quality characteristics set (i.e..the output of quality characteristic set),then it can be spread to the key processAs showninfigure:E-mail:cunrong_li@163.com2025/8/7

The principle of quality function deployment Quality function deployment follow the principle of concurrent engineering. After making key quality characteristics set (i.e., the output of quality characteristic set), then it can be spread to the key process. As shown in figure： 2025/8/7 9 E-mail:cunrong_li@163.com

Principleof QFDin parallel:Identify key process inputand outputvariablesTechnicalreguirementdevelopmentkeyCustomerdemand quality tablecustomerkeydemanddevelopmentprocesskeykey qualityProcessprocesscharacteristicsquality tableoutputoutput(CTQ)variableVariable(KPOV)Keyprocessinputvariable(KPIV)E-mail:cunrong_li@163.com2025/8/710

quality table key customer demand key quality characteristics （CTQ） Technical requirement development quality table key process output variable （KPOV） Key process input variable （KPIV） key process Customer demand development Process output variable 2025/8/7 10 E-mail:cunrong_li@163.com Principle of QFD in parallel: Identify key process input and output variables