I set up Adobe Analytics alerts with the following configuration:
Visits + "anomanly below expected" + "99.75% threshold"
Now I am receiving ten emails per day saying that my visits were 30% below expected.
In my opinion, these are false positives.
However, I only want to be notified when the visits are 99.75% below expected.
Can you help or clarify how anomaly and threshold play together?
Anomalies are based on Standard Deviations.
You need to understand how Adobe calculates anomaly so that you can understand the threshold. If you have an alert for hourly granularity, the 24-hour cycle, as well as the weekend/weekday cycle is validated. So, if the numbers change based on the threshold, you should receive an alert.
If you think you have more false alerts, try some other conditions or check whether you want to stop the alerts during the non-peak hours (Like 12:00 AM to 4:00 AM). There are some workarounds for that, check google.
You should read this blog on how to stop false alarms during off peak hours: https://experienceleaguecommunities.adobe.com/t5/adobe-analytics-blogs/woken-up-at-3am-by-false-hour...
I can't help you more with the anomaly detection... to be honest, I don't use that feature since I don't really trust how it calculates anomalies.... I create my own alert thresholds...