Page 129 - Design for Six Sigma for Service (Six SIGMA Operational Methods)

104 Chapter Six

Before QFD can be implemented, a multidisciplinary DFSS team needs to
be in place and more time should be spent upstream understanding customer
needs and expectations and defining the product or service in greater detail.

There are many initial realistic concerns that must be addressed in order to
implement QFD successfully. For example, departments represented in the
team do not tend to talk to one another. In addition, market research
information is not technically or design focused, and QFD is more easily
applied to incremental design than to brand creative design. The traditional
reality that problem prevention is not rewarded as well as problem solving
will be faced initially be the DFSS team. This “reality” will fade away as the
team embarks on its project using the rigor of DFSS.

6.4 QFD Methodology Overview

Quality function deployment is accomplished by multidisciplinary DFSS
teams using a series of charts to deploy critical customer attributes
throughout the phases of design development. QFD is usually deployed in
multiple phases. Figure 6.2 shows the typical four-phase deployment in a
typical manufacturing setting. The four phases are
Phase 1: CTS planning
Phase 2: Functional requirements
Phase 3: Design parameters planning
Phase 4: Process variables planning

Hows
CTS
requirements
Hows
Functional
Whats Customer attributes House of requirements parameters Hows
Design
quality
1
Process
Whats CTS requirements House of variables
quality
Prioritized 2 House of
CTS Whats Functional requirements quality
requirements 3 House of
Prioritized Whats Design quality
functions parameters 4
Prioritized
parameters
Prioritized
variables
Figure 6.2 Four Phases of QFD in Manufacturing Application