obtain an appropriate coverage of the problem domain. Issues such as
the effects of case aggregation (for example, is there a target number of
cases to collect?) and case duplication (for example, what should be
done about redundant cases?) were tackled. Thereafter, the reference
case evolved with use over time, and the application was tested con-
tinuously as it expanded.
Once the ControlSCAPE case base was stabilized, it became the case
library, and the application was ready for implementation. (The sys-
tem architecture is shown in Figure 6.1.) The most appropriate
method of case retrieval was decided. This included deciding the rela-
tive importance ...