Hardware Reference
In-Depth Information
project database. We calculated the average duration of the tasks as the time elapsed
between these two events. First, we considered all cases in the event-log. Figure 3
shows a graphical overview of the task duration for each of the lifecycle phases.
70
60
50
40
30
20
10
0
resolution
evaluation
c u mmulat iv e
Fig. 3.
Duration of tasks per lifecycle phase (all cases)
As we discovered in previous case study [4], majority of the cases does not con-
form to the specified process model by skipping the
Analysis
task. We were interested
in the impact this deviation made on performance characteristics of the process, hence
we examined such cases (as not analyzed cases) separately. Figure 4 shows a graphi-
cal overview of the results. The duration of the tasks
Resolution
and
Evaluation
is
slightly longer than the average duration when considering all cases.
5.1 Different Durations of Tasks
Figure 3 shows that during the
Specification
and
Design
phase, the
Resolution
tasks
take a large amount of time. A possible explanation to this could be that the product is
not clearly defined and structured in the beginning of the project. Therefore, the
Analysis
could be more difficult and, as a result, not much executed.
