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ESD.33 Systems Engineering
Assignment 3
Quality Function Deployment
Due Date: 29 June, 8:30AM EST
Deliverable: Team written report (about five pages)
Time allotment: You should expect to spend 5 hours all together on this homework.
Grading: 5% of your final course grade. Every team member earns the same grade.
Objectives:
This assignment is primarily aligned with the third objective of the course – “apply the
most essential systems engineering tools” but it also helps to sharpen your ability to
“judge the applicability of any proposed process, strategy, or methodology for systems
engineering using the fundamental concepts from disciplines such as of probability...”
Assignment:
Self select into teams of 3 to 5 people. In this case, I think it is best to create a
heterogeneous team since QFD will normally be practiced with large, multi-disciplinary
groups.
1) Select a system of interest to you (or a subsystem thereof) and develop a House of
Quality (HoQ) for it. Provide a similar level of detail as in Exhibit X (see below) of
Hauser and Clausing (about 10 customer attributes and 10 engineering characteristics).
Provide some supporting text or annotations to explain the HoQ. For example, you will
need to explain what the system is and who the customers are.
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X
X
X
X
X
X
X
X
X
SealingInsulation
Objective
Measures
Isolation
Easy to Open
and Close Door
Easy to close from outside
7
Stays open on a hill
5
Easy to open from outside
3
Doesn`t kick back
3
Doesn`t leak in rain
3
No road noise
2
Measurement Units
Our car door
A`s car door
Targets
+Road noise reduction
Medium Positive
+Water resistance
+Door seal resistance
- Peak closing force
+ Check force on 10o slope
- Energy to open door
Strong Positive
X
Medium Negative
X
Strong Negative
Customer Perceptions
1
2
3
4
5
X
ft-lb lb
lb ft-lb lb
lb-ft
db psi
3 .10 9
70
12 6
9 13
2 .10 5
60
Our Car
9.5 11 7
11 14
2 .10 6
60
A`s Car
B`s Car
9
Technical Difficulty
Imputed Importance (%) (all total 100%)
Relationships
X
11 12 6 10 18
B`s car door
Estimated Cost (all total 100%)
+ Check force on level ground
Customer
Attributes
- Energy to close door
Engineering
Characteristics
Relative Importance
Open-Close
Effort
+Acoustic transmission, window
X
4
5
1
1
3
1 3
3
5
10
6
4
9
1
6 2
4
3
5
2
2
9
5
6 6
9
2
3 .10 9
70
7.5 9
6 7.5 12
A complete HoQ.
(Adapted from Hauser and Clausing.)
2) Take a small subset (about 2 by 2) of the House of Quality you developed in part 1 and
create at least three small, linked houses flowing down the customer attributes to
manufacturing, maintenance, operations, or whatever downstream considerations are
appropriate to the system. Your figure will be akin to Hauser and Clausing Exhibit XI.
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3) Write a short essay (about 500 words) comparing QFD with an alternative approach to
requirements development and analysis. Ideally, the alternative should be one with which you
have direct experience.. If you do not have such an experience, study an alternative to QFD
(preferably choose a method for which you can find data or theory to support it effectiveness).
What do you recommend for use in your industry?