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This represents the interval within that period that you wish to monitor. The options available in the dropdown will depend on the Period to Monitor that has been chosen.

Period: Year

• Year

Period: Month

• Month

Period: Week

• Week
• Day
• Hour
• Half Hour
• 15 Minutes

Period: Day

• Day
• Hour
• Half Hour
• 15 Minutes

Click here to look at example configurations

Choose from:

• Data Prior to Check Period - this will compare recent data against the period of time directly prior to the period being checked.
• Data Ending on A Fixed Date - this will compare recent data against the period of time directly prior to the end date that has been specified.

Specifying a number greater than one here specifies an offset as to how many prior periods should be skipped when determining the period of time to compare the recent behaviour against.

By default this would be "1" and this means:

• Year - compares against equivalent interval in year directly prior
• Month - compares against equivalent interval in month directly prior
• Week - compares against equivalent interval in week directly prior
• Day - compares against equivalent interval on day directly prior

Some examples where the offset may be changed to something other than "1":

• if a Period of Monthly, if the offset is one, it would compare the last month of data with the month directly prior. However, if you want to compare a month with the same month in the previous year, an offset of 12 could be specified.
• if a Period of Daily is used, if the offset is one, it would compare the last day of data with the day directly prior. However, if you want to compare a day with the same day in the previous week, an offset of 7 could be specified.

This will define the number of prior periods of time that will be used to derive an average profile which the recent data can then be compared to to determine if it is suspect or not.

For example if the period selected is:

• Daily - it will source the data for equivalent intervals for the previous x days and calculate an average
• Weekly - it will source the data for equivalent intervals for the previous x weeks and calculate an average

Amend the Fixed date using the arrows or the calendar

Use the tickbox to the left of the High Threshold label to enable/disable the high threshold check.

The  value entered here is effectively the sensitivity of the upper limit that is permitted when the recent data is compared against the historical data (i.e. where the data spikes). This should be considered in conjunction with the type of threshold listed below. 

Use the tickbox to the left of the Low Threshold label to enable/disable the low threshold check.

The value entered here is effectively the sensitivity of the lower limit that is permitted when the recent data is compared against the historical data (i.e. where the data drops). This should be considered in conjunction with the type of threshold listed below. 

Choose from:

• Percent - this is to say that the exception should be raised if the recent data exceeds the permitted tolerance by a specified percentage
• Units - this is to say that the exception should be raised if the recent data exceeds the permitted tolerance by a specified number of units (e.g. 10 kWh or 5m³)
• Standard Deviations - this is to say that the exception should be raised if the recent data exceeds the permitted tolerance by a number of standard deviations from the mean

This setting allows you to control how sensitive the check is and whether it should only alert you if the issue is a consistent problem. 

For example, you maybe performing a daily check against the same day last week. You might only want it to tell you if a problem is found 2 days in a row, in this case this would be set to "2".