The House of Quality
Correlation
matrix
Design
requirements
Customer
requirements
Relationship
matrix
Specifications
or
target values
Competitive
assessment
House of Quality Example
Correlation:
X
X
Water resistance
Accoust. Trans.
Window
Check force
on level
ground
Energy needed
to open door
Door seal
resistance
Energy needed
to close door
Engineering
Characteristics
X
X
X
X
*
Strong positive
Positive
Negative
Strong negative
Competitive evaluation
X = Us
A = Comp. A
B = Comp. B
(5 is best)
1 2 3 4
Customer
Requirements
Easy to close
7
X
Stays open on a hill
5
X AB
Easy to open
3
Doesn’t leak in rain
3
No road noise
Importance weighting
2
AB
XAB
A XB
X
BA
X
9
Reduce energy
to 7.5 ft/lb.
B
A
X
B
X
A
2
3
Maintain
current level
B
A
6
Maintain
current level
5
4
3
2
1
6
Maintain
current level
Reduce energy
level to 7.5 ft/lb
10
Reduce force
to 9 lb.
X A
Target values
Technical evaluation
(5 is best)
5
BXA
BA
X
Relationships:
Strong = 9
Medium = 3
Small = 1
B