INTRODUCTION TO SOFTWARE DESIGN FOR SIX SIGMA (DFSS) - Software Design for Six-Sigma: A Roadmap for Excellence - page 196

Classification in this manner aids CTQ definition and paves the way for develop-
ment of the QFD that includes several components besides the customer CTQs, as
shown in Figure 8.A.2.
The HOQ is built with the following rooms (Chapter 12):

Customer needs (Room 1): What is needed for the house gets specified here
with each row representing a VOC (need, want, or delight).
Characteristic measured (Room 3) : Identify the CTQs that are captured as a
technical requirement and are assigned a column in the house. There may be a
need to dive deeper into each of the How(s) until such time the factor becomes
a measurable quantity. This results in the HOQ extending beyond one level.
Correlation (Room 4): Reflects the impact of each CTQ on the customer re-
quirement. The impact is color coded as strong, medium, or weak. Empty spaces
indicate that there is no interaction.
Competitive customer rating (Room 2): Top product or technical require-
ments based on customer needs are identified by assigning an influence fac-
toronascaleof1 ... 10, where 1 implies least impact, which is used to find

effects.
Conflicts (Room 8): Provides correlation information in terms of how meeting
the technical requirement impacts the product design. This information typically
is updated during the design phase and is used in design tradeoffs.
Targets and limits (Room 7): Get incorporated into the QFD as part of the
Measure phase.
Customer importance (Room 1): Ranking of the VOC on a scale of 1 ... 5, where
5 is the most important.

8.A.3 DIDOVM PHASE: IDENTIFY

In this phase, other aspects that are a focus of this phase include the creation of a
project charter that identifies the various stakeholders, the project team.
The identification of stakeholders as in Figure 8.A.3 ensures that linkages are
established to the various levels (technical, commercial, sales, finance, etc.) to obtain
necessary buy-in and involvement from all concerned. This is of great importance
in ensuring that bottlenecks get resolved in the best possible way and that change
management requests are getting the appropriate attention.
The CTQ(s) identified in the Define phase are referred as the Y(s). Each Y can
be either continuous or discrete. For each Y, the measurement method, target, and
specification limits are identified as a part of the Measure phase.
If the CTQ is a continuous output, typical measurements and specifications relate
to the performance of the CTQ or to a time-specific response (e.g., DVD playback
time after insertion of a DVD and selection of the play button). Discrete CTQ(s)
could pose challenges in terms of what constitutes a specification and what is a
measure of fulfillment. It may be necessary to identify the critical factors associated