24 品質機能展開を活用した技術開発プロセス …

1 135 2016 24 1 Technical Research Center Technology Development Process Using QFD QFD Quality Function Deployment QFD QFD TRIZ QFD TRIZ Summary QFD (Quality Function Deployment) is very effective framework to find relation between demanded quality and quality characteristics.

2 This tool is generally used to find the technical issue and the contradictions among technical characteristics in order to achieve the end-user demand. However, since the scientific development complicates whole society, it is very important to achieve social quality which meets not only the demand of product user but also the demand of other people in the society. To that end, QFD process is modified to find and resolve the contradictions between the demand of product user and the other people in the society. In the relation table between the demanded quality and the quality characteristics, the characteristic direction of relation is added to the strength of effect. The direction of relation is classified into three kinds of response: larger-is-better response, smaller-is-better response, and nominal-is-best response.

3 The information of the direction can be used to define the physical contradictions and the technical contradictions. The contradictions found by QFD can be used for TRIZ (Theory of Inventive Problem Solving). Moreover, the direction of quality characteristics can be effectively used for the design of experiment. The technical development process is developed using QFD as framework combining TRIZ and Quality Engineering. The processes have been implemented into work-sheet of the spreadsheet generally used. The technology development can be conducted efficiently and systematically along the work-sheet. 1 Yoji Yamada 136 2016 1. QFD 2.

4 2001 (1) 4 DMAIC 1 DFSS 2 1 Define-Measure-Analyze-Improve-Control 2 Design For Six Sigma DMAIC DFSS DFSS DMAIC

5 DoMAIC DoMAZDA DoMAIC Define-outlook-Measure-Analyze-Improve-C ontrol DoMAZDA Define-outlook-Measure-Analyze-ZoomZoom- De-sign-Assure Table 1 Seven Phases of DoMAZDA Model Phase / Define technical issues Set the target of characteristics as metrics Output Technical development plan (excluding schedule) Time management, Risk management ( ) Man power plan, estimate cost Output Technical development plan (schedule) Define current and similar system, confirm performance Define and analyze measurement system Output Current system performance, MSA results Qualitative and quantitative analysis of issue Analysis of issue mechanism Output Issue quantitative analysis results Idea, method and validation of solution for issue.

6 Preliminary experiment, quantitative evaluation of concept Output Solution for technical issue and verification results Robust design Tuning design Output Optimized system/process Prevention of issue Functionality evaluation OutputFMEA FMEA sheet, functionality evaluation result Major process and outputDesign ProcessAssure ProcessAnalyze ProcessZoom-Zoom Processoutlook ProcessMeasure ProcessDefine Process 137 2016 DMAIC Define Define Measure outlook DoMAIC Measure MSA Measurement System Analysis Improve DoMAZDA Table 1 Define outlook Measure Analyze Zoom-Zoom Design Assure 7 DoMAZDA DFSS DoMAZDA DoMAIC

7 DoMAIC DoMAZDA DoMAZDA 3. QFD QFD QFD QFD DoMAZDA QFD DoMAZDA Fig. 1 Processes in Define Phase Define outlook Define QFD Fig. 1 Define 7 Analyze 1 3C Customer Company Com-petitor SWOT Strengths Weak-nesses Opportunities Threats SWOT QFD 2 VOC Voice of Customer VOC

8 3C SWOT VOC VVOC: Virtual VOC VOC 138 2016 3 VOC 4 QFD (2)

9 Zoom-Zoom Design TRIZ 3 Table 2 Table 3 Table 3 Table 2 Marks of Quality Characteristics Table 3 Example of Quality Table 5 Table 3 TRIZ Table 3 TRIZ

10 Characteristics Large Effect Small Effect Larger-is-better Response Smaller-is-better Response Nominal-is-best Resp onse Perceptible quality Perceptible quality Large cabin Large cabin Quiet cabin Quiet cabin Good fuel mileage Good fuel mileage Pedestrian safety Pedestrian safety Easy parking Easy parking Quality characteristics Conventional Quality Table Proposed Quality Table Quality characteristicsWidthHeightAerodynamiEngi ne noiseHeightAerodynamiEngi ne noiseWidth 139 2016 Table 3 6 10 90 10P2 45 10C2 Fig.