(SHORT
NOTES FROM STRATEGY TOOLS:
Quality
Strategy at http://www.mindtools.com)
Critical to Quality (CTQ) Trees, as
shown in figure 1, below, are diagram-based tools that help to develop and
deliver high quality products and services. They are use to translate broad customer needs
into specific, actionable, measurable performance requirements. CTQ Trees were originally developed as part
of Six Sigma. They can be used in a
variety of situations, including when developing products and services for your
"internal customers."
Figure 1 – A CTQ Tree
Steps to use CTC Trees:
·
first identify the critical needs of customers
o
what product or service must deliver for
customers to be happy.
·
Then, identify its quality drivers for
each need.
o
the factors that customers will use to
evaluate the quality of your product.
·
Finally, identify measurable performance
requirements that each driver must satisfy
How to Use the Tool
Step
1: Identify Critical Needs
·
Essential question, "What is critical
for this product or service?"
·
define these needs in broad terms
Step
2: Identify Quality Drivers
·
identify the specific quality drivers to
be in place to meet the needs
·
it's important to identify all of the
drivers that are important to customers.
·
speak to people with customer contact
·
ask customers what factors are important
to
·
identify product features that will
delight customers.
Step
3: Identify Performance Requirements
·
identify the minimum performance
requirements to satisfy each quality driver
·
it's important to remember that there
are many things that will affect the ability to deliver
Once the CTQ Tree is completed for each
critical need, you'll have a list of measurable requirements that must be met
to deliver a high quality product.