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