Templates  

Different approaches are described in literature and case studies on how to form a QFD cascade of several Houses of Quality. Templates for two commonly used approaches are available for selection:

3 Houses of Quality:

Cascade of three QFD matrices implementing the mapping of design domains as described by Num Pyo Suh in “Axiomatic Design”.

1. 1

   QFD 1 - House of Quality: House of Quality of CTQs over VOC. Mapping of the customer domain to the functional domain.
2. 2

   Component Design Matrix: Matrix of design parameters (characteristics) over CTQ's. Mapping of the functional domain to the physical domain.
3. 3

   Characteristics Matrix: Matrix of process steps and process parameters over design parameters (characteristics). Mapping of the physical domain to the process domain.

4 Houses of Quality:

Cascade of four QFD matrices implementing the mapping described in a case study by Makabe frequently reproduced in literature on Quality Function Deployment.

1. 1

   QFD 1 - House of Quality: First “House of Quality” of CTQs over VOC.
2. 2

   QFD 2 – CTQs to Functions: Second “House of Quality” of functions over CTQs.
3. 3

   QFD 3 – Functions to Characteristics: Third “House of Quality” of characteristics over functions.
4. 4

   QFD 4 – Characteristics to Process: Fourth “House of Quality” of process steps over characteristics.