QFD – Quality Function Deployment … a brief guide
Issue 1.0July 2012
Tips / Dangers / Source
QFD is sometimes know as the “House of Quality”. This is due to the resemblance
(especially of the ‘How’ correlations, to a roof) of the diagram to a house.
The ‘House of Quality’ is the central construct of QFD and the elements included
should be tailored to your organisation.
QFD was conceived in Japan in the late 1960’s in response to challenges in the
The House(s) of Quality
The Basic House of Quality
Matrix comparison of WHATs (customer needs) and
HOWs (technical design requirement, or function).
There is no `fixed` symbology but a standard
should be chosen.
Use clear symbols in your QFD`s.
An example of symbols is below:
Flow from Customer Need to Production Requirements
Decomposition Between System Levels
The Process for doing a QFD1
QFD 1 relates to the required properties of system of
interest to the required functionality.
The steps to build a‘House of Quality’
Step 1 – Identify customer / stakeholder “WHATs”
and record any specified targets
Step 2 – Translate customer / stakeholder wants into
measurable technical requirements
(the “HOWs” (translating for action)
Step 3 – Determine relationships
between customer and technical
Step 4 – Determine targets for the technical
requirements (traceable to customers needs)
Step 5 – Identify requirements correlations / trade-offs
Step 6 – Assess importance and competitive assessments
This summary is based on material prepared by Richard Beasley of Rolls-Royce plc for INCOSE UK
one day event “Simple Systems Techniques That Work”, which in turn was based and derived from
the training provided by Stuart Burge of Burge Hughes Walsh.
This leaflet is intended as a working guide to Quality Function Deployment
This series of working guides is produced by members of the UK Chapter of INCOSE.
For further information, advice and links to helpful websites go to: www.incoseonline.org.uk
Members can download copies of this leaflet and other Systems Engineering
resources online at: www.incoseonline.org.uk
For more information about the worldwide Systems Engineering
professional community, go to: www.incose.org
Series editor: Hazel Woodcock Lead author: Richard Beasley (Rolls-Royce plc) © 2012 INCOSE UK Ltd