This will give you your expert task time metric
to determine the product ease-of-use metric (see Chapter 18).
FIGURE 17.2
Inception phase process
Start
Update the
useability test plan
Recruit the UTCs De?¬?ne an usability
test environment
Identify scenarios
Build a matrix of
feature/work
scenarios
Build a matrix of
user/work scenarios
Identify
con?¬?rmatory
metrics
Calibrate the
scenarios
De?¬?ne the UTCs??™
test experience
Review the
scenarios
Identify bug and
bug severity basis
Assess the results
Report on the
inception phase
Stop
Review the user
manuals and
training
Dry-run software Run sample
scenarios
Write task
instructions and
UTC screening
questionnaire
294
Manage Software Testing
???
Define the UTCs??™ test experience
as a process. This may be a simple memo or a more complex
model. You need to know what the UTCs will experience from the moment they walk into the
building to the moment they leave. Otherwise UTCs may be:
??“ Insufficiently prepared
??“ Unamenable to return for follow-up (is it too long?)
??“ The experience may be too unrealistic to be useful)
???
Write
UTC and observer
task instructions,
and validate them with the users, training staff, and
the usability guru. If necessary write a UTC screening questionnaire to exclude participants who
are too knowledgeable, clever, or the reverse.
???
Review the user manuals and training
expected to be ready for the start of the tests.
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