Description
This alert will determine if any SQL had a plan change within he last 90 min (configurable in script) that resulted in a higher amount of wait time on average for the query. Plan changes are not necessarily bad, but if the wait times go up, that is a good indication the new plan is not as good as the previous.
Alert Definition
To create the alert, click on Alerts > Manage Alerts tab and create a Custom Alert of type Custom SQL Alert - Multiple Numeric Return. Configure the alert as needed and paste in the attached script.