The Threshold value represents the number of records that, when added to the log buffer, will result in a transition to NORMAL. If this variable has a value of zero, then no transitions will be indicated by the algorithm.
The PreviousCount value represents the value of pMonitoredValue at the time the most recent transition to NORMAL was indicated. Upon initialization of the event algorithm, this parameter shall be set to the value of pMonitoredValue. When a transition to NORMAL is indicated, this parameter shall be updated to the value of pMonitoredValue.