The fl ows are the same, only their distribution across the use cases
would differ. It is absolutely normal that new information is won as we work on
the details which affect the previous modeling steps in arrears. Your modeling can
be only as exact as the current abstraction level permits.
The information fl ow mileage from the sensor car movement data participates
in a special use case. Use cases that are triggered by a sensor information
often ??? feel ??? a little strange.
The information mileage seems to trigger a new fl ow. The system determines
how many kilometers have been done and how much time has elapsed since
usage started; then it compares the current time with the scheduled reservation
end, and fi nally shows the result in a display unit. The party interested in this
result is the customer. From their views let ??™ s call this use case show car usage
data ( Figure 2.36 ).
Do you think your use case has a strange look and feel? No? In that case
you can skip the following lines. Yes? Then the reason is probably that the described
fl ow represents only a traversal of a continuous fl ow.
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