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Chapter 2 ■ Generic Concepts
gate will be TRUE. If fit for purpose is also TRUE, then you create value. If any one of the
inputs is FALSE, then value cannot be created. It’s like having a mobile network and a
capable mobile instrument but lacking sufficient bandwidth to allow you to slot your calls
through. It’s like having a top-notch, state-of-the-art television set but no electricity to run it.
Creating value is represented through an AND gate. Refer to Table 2-1 to help you
understand when the value is created.
Table 2-1. Creating Value Through the AND Gate
Fit for Purpose Fit for Use Value Created?
TRUE TRUE YES
TRUE FALSE NO
FALSE FALSE NO
FALSE TRUE NO
2.1.2 Utility of a Service
The utility is the functionality offered by a product or a service to meet a
particular need.
The logic diagram in Figure 2-3 shows an OR gate for the utility part of a service.
UTILITY
Performance supported?
Constraints removed?
OR
T/F
Figure 2-3. Utility of a service
For a service to be fit for purpose, it needs to meet any one (or both) of the
following criteria:
1. Performance supported
2. Constraints removed
These criteria are represented through an OR gate, and Table 2-2 provides the
conditions when the service would be fit for purpose.
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