Quality function deployment
- 2. QUALITY FUNCTION DEPLOYMENT (QFD) Quality Function Deployment (QFD) is an approach to design introduced in Japan in 1966 by Yoji Akao.
- 3. Dr. Akao is a professor of industrial Engineering at Tamagawa University in Tokyo and is one of the foremost leaders in the TQC movement in Japan. He has long led and participated in many of the key research committees of the Union of Japanese Scientists and Engineers (JUSE), the Japanese Standards Association (JSA) and the Japanese Society for Quality Control (JSQC)
- 4. • QFD may be defined as a system for translating consumer requirements into appropriate requirements at every stage, from research through product design and development, distribution , to manufacture,installation and marketing ,sales and service
- 5. • QFD METHODOLOGY 1.List of customer requirements (WHAT’S) List of technical descriptors (HOW’S) Develop a customer relationship matrix (WHAT & HOW ) Develop an interrelationship matrix (BETWEEN HOW ) Competitive assessments Develop prioritized customer requirements Develop prioritized technical descriptors House of quality
- 6. Why QFD? A lack of well defined product development processes in research and design can be the root cause for the ruination of a company. To have a successful product, we must understand user needs.
- 7. Why QFD? QFD provides a formal process to understand user needs and to weave these needs across the entire product development cycle including manufacturing.
- 8. DEFINITION OF QFD QFD is a very systematic and organized approach of taking customer needs and demands in the consideration when designing a new products and services or when improving existing products and services.
- 9. CUSTOMER DRIVEN PRODUCT DEVELOPMENT Design Requirements Cu Sto mer vo ice P r o c e s s P a r t s D e s i g n Process Requirements Production Standards Parts Requirements Phase I: Product Planning Phase II: Part Deployment Phase III: Process Planning Phase IV: Production planning Phase I: Product Planning Phase II: Part Development Phase III: Process Planning Phase IV: Production planning
- 10. QFD BENEFITS CUSTOMER DRIVEN •Creates forces on customer requirements •Uses competitive information effectively •Prioritizes resources
- 11. QFD BENEFITS CUSTOMER DRIVEN •Identifies items that can be acted upon •Structures resident experience/ Information
- 12. QFD BENEFITS REDUCES IMPLEMENTATION TIME •Decreases midstream design charge •Limits post introduction problems •Avoids future development redundancies
- 13. QFD BENEFITS REDUCES IMPLEMENTATION TIME •Identifies future application opportunities •Surfaces missing assumptions
- 14. QFD BENEFITS PROMOTES TEAMWORK •Consensus based •Creates communication at interfaces
- 15. QFD BENEFITS PROMOTES TEAMWORK •Identifies actions at interfaces •Creates global view out of details
- 16. QFD BENEFITS PROVIDES DOCUMENTATION • Documents rationale for design • Is easy to assimilate • Adds structure to the information
- 17. Technical Descriptors (HOWs) Material Selection Manufacturing Process BASIC HOUSE OF QUALITY MATRIX +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors HOWs Vs. HOWs.
- 18. QFD BENEFITS PROVIDES DOCUMENTATION •Adapts to changes, a living document •Provides framework for sensitivity analysis
- 19. Technical Descriptors (HOWs) Material Selection Manufacturing Process BASIC HOUSE OF QUALITY MATRIX +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors HOWs Vs. HOWs.
- 20. Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable REFINEMENT OF CUSTOMER REQUIREMENTS
- 21. Steel Aluminum Titanium Welding Die Casting Sand Casting Forging REFINEMENT OF TECHNICAL DESCRIPTORS Power Metallurgy
- 22. Technical Descriptors (HOWs) Material Manufacturing Selection Process Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable STRUCTURING AN L-SHAPED DIAGRAM Secondary
- 23. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING RELATIONSHIP MATRIX TO THE HOUSE OF QUALITY +9 Strong +3 Medium +1 Weak` Relationship between customer requirements and technical descriptors WHATs Vs. HOWs.
- 24. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING INTERRELATIONSHIP MATRIX TO THE HOUSE OF QUALITY +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative Interrelationship between technical descriptors (Correlation Matrix) WHATs Vs. HOWs. Relationship between customer requirements and technical descriptors WHATs Vs. HOWs. +9 Strong +3 Medium +1 Weak
- 25. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING CUSTOMER COMPETITIVE ASSESSMENT TO THE HOUSE OF QUALITY +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors WHATs Vs. HOWs.
- 26. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING TECHNICAL COMPETITIVE ASSESSMENT TO THE HOUSE OF QUALITY +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors WHATs Vs. HOWs.
- 27. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING PRIORITIZED CUSTOMER REQUIREMENTS TO THE HOUSE OF QUALITY +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors WHATs Vs. HOWs.
- 28. Technical Descriptors (HOWs) Material Selection Manufacturing Process Secondary Reasonable Cost Aerodynamic Look Nice Finish Corrosion resistant Light Weight Strength Durable ADDING PRIORITIZED CUSTOMER REQUIREMENTS TO THE HOUSE OF QUALITY +9 Strong Positive +3 Positive -9 Strong Negative -3 Negative +9 Strong +3 Medium +1 Weak Interrelationship between technical descriptors (Correlation Matrix) HOWs Vs. HOWs. Relationship between customer requirements and technical descriptors WHATs Vs. HOWs.