palanivendhan palani vendhan TQM SRM UNIVERSITY

1. QUALITY FUNCTION
DEPLOYMENT (QFD)

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
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P
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P
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D
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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.