House of Quality for a commuter e-bike
A commuter e-bike has to satisfy riders who value range, portability and safe braking at the same time. This QFD matrix links those needs to battery capacity, frame mass and brake rotor diameter. The strongest cells identify direct engineering levers, while the lighter links show secondary effects. The roof draws attention to the fundamental trade-off between a larger battery and lower weight. That trade-off is not a reason to abandon either need; it is a prompt to test options and agree on a target market. The team can use this House of Quality to keep product, engineering and sourcing conversations tied to the needs commuters actually describe.
Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.
Scenario
An e-bike team is balancing commuter needs before selecting a frame and battery architecture.
Key decisions
- Prioritize safety: Keep wet braking visible alongside range and portability.
- Test trade-offs: Validate the mass impact of battery capacity with prototypes.
- Focus specifications: Use the calculated priorities to guide supplier choices.
When to reuse this
Use for consumer products where one technical improvement can harm another valued outcome.
Frequently asked questions
Can QFD include safety needs?
What does a negative roof relationship mean?
Does QFD choose the final design?
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