Quality Function Deployment (QFD) is a systematic approach to product development that focuses on understanding customer needs and using that information to ensure that these needs are addressed at each stage of development. QFD has four phases: product planning, part deployment, process planning, and production planning. It provides benefits such as being customer-driven, reducing implementation time, promoting teamwork, and providing documentation to support design decisions. The core of QFD is creating a house of quality matrix that links customer needs to technical requirements using a correlation matrix.

1. QUALITY FUNCTION
DEPLOYMENT (QFD)
by
Sanower Ali Azad
GGSIPU, NEW DELHI

2. QUALITY FUNCTION
DEPLOYMENT (QFD)
Quality Function Deployment (QFD) is
an approach to design introduced in
Japan in 1966 .

3. 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.

4. Why QFD?
QFD provides a formal process to
understand user needs and to weave these
needs across the entire product
development cycle including
manufacturing.

5. 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.

6. CUSTOMER DRIVEN PRODUCT DEVELOPMENT
Design
Requirements
Cu
Sto
mer
vo
ice
Process
Parts
Design
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
Deployment
Phase III: Process
Planning
Phase IV:
Production
planning

7. QFD BENEFITS
CUSTOMER DRIVEN
•Creates forces on customer
requirements
•Uses competitive information effectively
•Prioritizes resources

8. QFD BENEFITS
CUSTOMER DRIVEN
•Identifies items that can be acted upon
•Structures resident experience/
Information

9. QFD BENEFITS
REDUCES IMPLEMENTATION TIME
•Decreases midstream design charge
•Limits post introduction problems
•Avoids future development
redundancies

10. QFD BENEFITS
PROMOTES TEAMWORK
•Consensus based
•Creates communication at interfaces

11. QFD BENEFITS
PROMOTES TEAMWORK
•Identifies actions at interfaces
•Creates global view out of details

12. QFD BENEFITS
PROVIDES DOCUMENTATION
• Documents rationale for design
• Is easy to assimilate
• Adds structure to the information

13. BASIC HOUSE OF QUALITY MATRIX
Technical Descriptors (HOWs)
Material Selection Manufacturing Process
+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.

14. REFINEMENT OF CUSTOMER REQUIREMENTS
Reasonable Cost
Look
Nice Finish
Corrosion resistant
Light Weight
Strength
Durable

15. REFINEMENT OF TECHNICAL DESCRIPTORS
Steel
Aluminum
Titanium
Welding
Die Casting
Sand Casting
Forging
Power Metallurgy

16. STRUCTURING AN L-SHAPED DIAGRAM
Technical Descriptors
(HOWs)
Material Manufacturing
Selection Process
Reasonable Cost
Look
Nice Finish
Corrosion resistant
Light Weight
Strength
Durable
Secondary