COMNET III

Statistics
The fields of the dialog are described below.
Note: If the Collect stats checkbox is not marked, COMNET will not collect the indicated
statistics regardless of the other settings.
Collect stats
Enables the collection of the data required to create the reports
for the statistics selected on the Statistics Requests dialog.
Normal statistics are available at the end of the simulation.
Basic statistics such as mean and maximum are collected when
the Collect stats button is turned on. Normal statistics are
generally available for both the cases where the statistics are
updated for each event, and for where the statistics are updated
with the mean values over an interval.
Save observations
Mean Interval
Saves to a file an observation for each monitored event. For
example, if the monitor is of message delay, the file will
capture the measured delay for each message. In the case of
monitoring levels such as link utilization, each change in state
is recorded to a file.
Note: This option provides valuable detailed data on each
monitor, but use it judiciously. Unlike the Collect stats option,
this option involves frequent file I/O that can slow down the
simulation. There is also the possibility of creating very large
and unmanageable observation files, if too many items are
collecting observations.
When this option is zero, the statistics are collected only on
the raw measurements, and if observations are collected, the
observations are of each individual event or state-change.
When the option is nonzero, a separate set of statistics are
collected by taking just one measurement each interval where
the measurement is representative of the interval. If
observations are saved, it is this single observation per interval
that is saved.
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