# Seasonal Event Graphs

The seasonal event graphs display bar charts and confidence level event thresholds for seasonal events.

The Seasonal Event Graphs portlet
consists of four charts:

- Minute of the hour
- The minute or minutes of the hour that the event occurs.
- Hour of the day
- The hour or hours of the day that the event occurs.
- Day of the week
- The day or days of the week that the event occurs.
- Day of the month
- The date or dates of the month that the event occurs.

The confidence level of the data in the charts is displayed
in three ways:

- The overall distribution score of each chart is displayed as high (red), medium (orange), or low (green) seasonality at the top of each chart.
- The degree of deviation of the events is indicated by the high (red) and medium (orange) seasonality threshold lines on the charts.
- The maximum confidence level of each bar is displayed as high (red), medium (orange), or low (green).

The default confidence level thresholds
are as follows:

- High: 99-100%
- Medium: 95-99%
- Low: 0-95%

## Understanding graphs

The four seasonal event graphs illustrate event seasonality. The graphs depict independent observations. For example, if the Hour of the day graph indicates a high confidence level for 5 p.m., and the Minute of the hour graph indicates a high confidence level for minute 35, it does not necessarily mean that the events all occur at 5:35 p.m. The 5 p.m. value can contain other minute values.

Note: In
some instances, Minute of the hour is indicated
as having a high confidence level but the overall confidence level
of seasonality is low. This is due to the high-level statistic that
does not include minute of the hour due to poll cycle of monitors.

Note: In
some instances, the overall confidence level of a chart is indicated
as high although none of the bars in the graph are in the red zone.
An example of this is a system failure due to high load and peak times,
with no failure outside of these times.

The seasonal event graphs Count refers
to the number of observations that are recorded in each graph. There
is a maximum of one observation for each minute, hour, day, and date
range. Therefore, the count for each of the graphs can differ. For
example, if an event occurs at the following times:

- 10:31 a.m., 1 June 2013
- 10:31 a.m., 2 June 2013
- 10:35 a.m., 2 June 2013