The calculation process of this example is very similar to Static one except its violation condition. Here, the Alert Type is Historical for values rising above 20% of the historical data for the past 12 weeks (from the same day and hour). For calculating the violation condition, 20% of the historical travel time data will be calculated and compared with the current value. In this example, the Aggregation Function is set to “Maximum”.
Aggregation Period = 2 data points (green braces)
Evaluation Period = 6 data points (red brace)
Number of Violations = 1 (out of 6/2= 3)
Because the evaluation results show no violations, the Alert state does not change from Normal.