1. HOUSE OF QUALITY
AVINASH SHARMA

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• House of Quality is a diagram, resembling a house, used
for defining the relationship between customer desires
and the firm/product capabilities.
• It is a part of the Quality Function Deployment (QFD) and
it utilizes a planning matrix to relate what the customer
wants to how a firm (that produces the products) is going
to meet those wants.

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Steps to the House of Quality
Step 1: Customer Requirements - "Voice of the
Customer”:
• What the customer need or expects.
1.1 Primary customer requirement:
• Aesthetics
• Performance

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1.1.1 Secondary Customer Requirements Under
Aesthetics :
• Low cost
• Safe
• Corrosion resistance
1.1.2 Secondary Customer Requirements Under
Performance :
• Fast
• Fuel efficiency
• Reliability

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Step 2 : Technical Descriptors - "Voice of the
Engineer”:
How to design a product that will meet the customer
requirements.
• Weight
• Engine power
• Cost of production
• Life expectancy

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Step 3: Relationship Matrix:
relationship between the technical descriptors and the
customers need.
Symbols:

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• Strong =9
• Good =3
• weak =1
Step 4 : Correlation Matrix:
• Relationship between the technical descriptors impact
each other. The correlation matrix is probably the least
used room in the House of Quality; however, this room is
a big help to the design engineers in the next phase of a
comprehensive QFD project.

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Symbols:
• ++ Strong positive (9)
• + Positive (3)
• - Negative (-3)
• -- Strong Negative (-9)

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Step 5 : Competitive Assessment:
5.1 Customer Competitive Assessment:
It is the block of columns corresponding to each customer
requirement. The no 1 to 5 are listed in column. 1 rating of
worst and 5 for best.

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5.2 Technical Competitive Assessment:
It is the block of columns corresponding to each customer
requirement. The no 1 to 5 are listed in column. 1 rating of
worst and 5 for best.

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