Quality function deployment
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Transcript of Quality function deployment
QUALITY FUNCTION DEPLOYMENT (QFD)
Quality Function Deployment (QFD) is an approach to design introduced in Japan in 1966 by Yoji Akao.
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)
• 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
• 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
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.
Why QFD?
QFD provides a formal process to understand user needs and to weave these needs across the entire product development cycle including manufacturing.
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.
CUSTOMER DRIVEN PRODUCT DEVELOPMENT
Design Requirements
CuStomer
voice
Process
Parts
Design
Process Requirements Production
Standards
PartsRequirements
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
QFD BENEFITS
CUSTOMER DRIVEN
•Creates forces on customer requirements
•Uses competitive information effectively
•Prioritizes resources
QFD BENEFITS
CUSTOMER DRIVEN
•Identifies items that can be acted upon
•Structures resident experience/
Information
QFD BENEFITS
REDUCES IMPLEMENTATION TIME
•Decreases midstream design charge
•Limits post introduction problems
•Avoids future development redundancies
QFD BENEFITS
REDUCES IMPLEMENTATION TIME
•Identifies future application
opportunities
•Surfaces missing assumptions
QFD BENEFITS
PROMOTES TEAMWORK
•Identifies actions at interfaces
•Creates global view out of details
QFD BENEFITS
PROVIDES DOCUMENTATION
• Documents rationale for design
• Is easy to assimilate
• Adds structure to the information
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.
QFD BENEFITS
PROVIDES DOCUMENTATION
•Adapts to changes, a living document
•Provides framework for sensitivity analysis
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.
Reasonable Cost
Aerodynamic Look
Nice Finish
Corrosion resistant
Light Weight
Strength
Durable
REFINEMENT OF CUSTOMER REQUIREMENTS
Steel
Aluminum
Titanium
Welding
Die Casting
Sand Casting
Forging
REFINEMENT OF TECHNICAL DESCRIPTORS
Power Metallurgy
Technical Descriptors (HOWs)
Material Manufacturing Selection Process
Reasonable CostAerodynamic LookNice Finish
Corrosion resistantLight WeightStrength
Durable
STRUCTURING AN L-SHAPED DIAGRAM
Secondary
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.
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
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.
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.
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.
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.