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A4-14 PROFES USER’S MANUAL
Every data collector needs to spend about ten minutes per
week on the task. The GQM expert’s work can be split into half
a day for preparing and conducting the briefing, and another
half-day for data validation, total one day. The manager spends
half an hour and the software engineer 18 hours in all.
• Perform data analysis and interpretation:
The GQM expert needs four days for preparing and conducting
the feedback-session, which lasts two hours. Other participants
in the feedback-session are the expert, the manager, and seven
out of ten software engineers.
• Package experience:
The expert packages experience from the measurement programme. He or she prepares and conducts the package review,
which requires one day. The manager and the four software
engineers (who participated as interviewees during the GQM
interviews) work one hour per person by reviewing and approving the packages.
Variations
There are various cost-linked factors that can affect GQM measurement
work. These variants are listed below and their impact is explained:
• Number of GQM goals:
If the number of GQM goals increases, then the amount of work
also increases in all activities starting with the “Identify and
Define GQM goals” step, as the usefulness of the goals has to
be discussed and a larger number of measures probably need
to be identified. Due to the fact that there are more measures,
more effort is also needed to develop the measurement plan. In
addition, more time is spent on data collection. The analysis
and packaging effort will also increase with every additional
GQM goal.
• Size of project team:
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Number of project participants
If the number of project team members increases, this will
necessitate a greater number of GQM interviews in order to
involve a sufficiently large number of engineers. The total effort
for data collection will also increase. Feedback sessions should
possibly be split into more than one meeting with different