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QFD Requirements prioritization

QFD Requirements prioritization. J.Jayaraman Center for Aerospace Systems Design and Engineering) Department of Aerospace Engineering Indian Institute of technology, Bombay DIAT POINTS COURSE 03-06-2008. Jap Co used QFD. Before QFD. US Co Did not use QFD. Product complaints.

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QFD Requirements prioritization

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  1. QFD Requirements prioritization J.Jayaraman Center for Aerospace Systems Design and Engineering) Department of Aerospace Engineering Indian Institute of technology, Bombay DIAT POINTS COURSE 03-06-2008

  2. Jap Co used QFD Before QFD US Co Did not use QFD Product complaints Design changes After QFD -14-17-1-3 0 +3 -5 -4 -3 -2 -1 0 +1 2 3 4 5 months months Comparison of design changes with and without QFD Toyota production start up problems before and after QFD Benefits of QFD JJ DIAT POINTS COURSE 02-06-2008

  3. Pre QFD startup Pre production 39% of pre QFD cost After QFD startup Pre production Loss Preparation training etc. Benefits of QFD Start up and Pre-production costs at Toyota before and after QFD JJ DIAT POINTS COURSE 02-06-2008

  4. Quality Function Deployment (QFD) • QFD is a concept developed by Yaji Akao • Developed at Kobe shipyard of Mitsubishi Shipyard early 1980s. • Xerox and Ford have used it • Typically applied to small systems. Being tried for large systems (NASA Lunar Rover) • It was developed to build design quality into a product JJ DIAT POINTS COURSE 02-06-2008

  5. Quality Function Deployment (QFD) It facilitates translation of a prioritized set of subjective customer requirements into a set of system level requirements during system conceptual stage It addresses customer requirements, design requirements, functions, parts, and failure modes JJ DIAT POINTS COURSE 02-06-2008

  6. Quality Function Deployment (QFD) Definition “ An organized, disciplined process for determining the product or service requirements necessary to achieve customer-perceived expressed or unexpressed quality” (Otten and Groeneveld 2002) JJ DIAT POINTS COURSE 02-06-2008

  7. Quality Function Deployment (QFD) • QFD permits analysis and determination of priority issues • QFD is a planning process • Out puts are the key action issues for improved customer satisfaction JJ DIAT POINTS COURSE 02-06-2008

  8. Quality Function Deployment (QFD) Hows vs. hows Benchmarking competition Customer weights Relative importance Design requirements Hows whys Relationship Matrix Whats vs. hows Whats vs. whys Customer Requirements whats How much How much vs. How much Prioritized requirements Competitive benchmarks Design targets JJ DIAT POINTS COURSE 02-06-2008

  9. Customer voice analysis Customer Requirements QFD provides integration through the life cycle phases of the system System Design Requirements Sub-system Requirements Part requirements Process requirements Customer importance Product design and development Manufacturing process design and development JJ DIAT POINTS COURSE 02-06-2008

  10. Requirements prioritization Improvement ratio: It is the ratio of desired performance to existing performance Sales point: It is the weight given to a requirement if it will improve the marketability of the product JJ DIAT POINTS COURSE 02-06-2008

  11. Requirements prioritization Customer weights: The importance customer gives to each of his requirements. It defines his priorities. Customer satisfaction: It is the rating of the existing product technical characteristics based on the customer requirements Planned satisfaction: It is the rating of the new product technical characteristics planned based on customer requirements JJ DIAT POINTS COURSE 02-06-2008

  12. Determining Target values Design Requirements Identify customer Requirements (CR) and weight Identify design requirements (DR) corresponding to CR Identify relationship between DR and CR Bench mark competitive products on CR Determine improvement ratio and revised weights of CR Calculate weight of DRs Choose best value of competing DR performance JJ DIAT POINTS COURSE 02-06-2008

  13. Video projector Customer requirements and weights Customer weights scale 1-9

  14. IPR- Improvement ratio Video projector benchmarking competitors Raw score= customer weight*IPR*sales point Revised Customer wt. = Raw score/ Raw score

  15. Video projector design requirements with their units

  16. Video projector Relationship matrix CRs vs. DRs CR No. Revised Cust. wts. Design requirements 1 2 3 4 5 6 7 8 9 10 11 1 6.0 9 9 3 1 9 1 9 3 1 3 2 1.4 3 9 1 3 1 3 14.0 9 1 1 1 9 1 4 14.0 5 1.2 1 1 1 3 1 6 16.8 1 1 3 1 3 9 7 3.6 1 1 1 1 9 9 8 12.9 3 1 1 3 1 3 9 11.9 9 3 3 3 3 9 3 3 10 18.3 236 109 109 282 307 31 35 274 165 105 232 Raw score 4 2 1 3 Rel.wt. % Priority

  17. Product A 700 400:1 800* 600 4.5 35 50 to 6000 1 350* 250* 100 60 40 40K Target s 700 400:1 800* 600 4 30 50 To 6000 1 305* 230* 100 50 40 50K Video projector Target requirements Surface temperature Set up time Audio quality Physical volume Audio volume Design requirements Image brightness Contrast ratio Image resolution Operating noise Weight MTBF Our product 500 350:1 600* 450 4.2. 30 50 to 6000 0.8 305* 230* 100 50 45 50K

  18. Quality Function Deployment (QFD) Solve water dispenser problem in place of the video projector JJ DIAT POINTS COURSE 02-06-2008

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