Adobe Alerts: Anomaly Above, Below, and Exists % Threshold

JL18 25-01-2019

Hello,

What is the difference between these states in Adobe alerts as it relates to the % threshold? The way it's worded is ambiguous to me.

  1. Anomaly exists
  2. Anomaly below
  3. Anomaly above

If I set the threshold to 95% for unique visitors to a page, for example, then can I interpret it as follows?

  1. Anomaly exists = the anomalous data falls within 2 standards of the expected value
  2. Anomaly is below = the anomalous data falls less than 2 standard deviations outside of the expected value, in which case, then it's 1 SD outside of the expected value?
  3. Anomaly is above = the anomalous data falls more than 2 standard deviations outside of the expected value, in which case, is it incorrect to think it's 3 SD outside of the expected value?

What additional meaningful information here does "anomaly below" or "anomaly above" give me that the "anomaly exists" doesn't?

Thanks!

Accepted Solutions (1)

Accepted Solutions (1)

Andrey_Osadchuk
MVP
28-01-2019

JL18​,

Exists means an anomaly is detected, does not matter there was a spike or a drop of the metric.

Below and Above stand for Decrease and Increase respectively. For example, if you want to be notified only when the value dropped (e.g. predicted number of orders was 100 while the actual number was 50), then choose "anomaly is below expected".

Does it help?