“Create a House of Quality for a commuter e-bike. Customer needs are long range with weight 5, easy to carry upstairs with weight 4, and confident stopping in rain with weight 5. Engineering characteristics are battery capacity, frame mass and brake rotor diameter. Show strong relationships between range and battery capacity, carrying upstairs and low frame mass, and wet stopping and rotor diameter; show a weak relationship between range and frame mass and a moderate relationship between carrying upstairs and battery capacity. Mark battery capacity and frame mass as strongly negatively correlated.”
図の背後にある意思決定を読み解く。
Keep wet braking visible alongside range and portability.
Validate the mass impact of battery capacity with prototypes.
Use the calculated priorities to guide supplier choices.
Use for consumer products where one technical improvement can harm another valued outcome.
よくある質問
Can QFD include safety needs?
Yes. Safety-related customer requirements can be weighted and mapped to the engineering characteristics that influence them.
What does a negative roof relationship mean?
It indicates that improving one technical characteristic tends to make another harder to achieve.
Does QFD choose the final design?
No. It structures priorities and trade-offs so the team can make an informed design decision.