We want to give employees a notification when parts that they request arrive.
I built a Saved Transaction Search with 4 CRITERIA:
Type: is Item Receipt
Main Line: is true
Date Created: is on Today
Subsidiary: is a specific selection

The RESULTS settings are:
Date
Document Number
Name
Account
Item: Description
Quantity
Requestor: Email
Created From

I set the EMAIL submenu to:
Send email alerts when records are created/updated
Recipients from Results: Requestor: Email
I added a Custom Message, and checked the INCLUDE VIEW RECORD LINK box.
I did not add a Schedule

The solution seemed to work perfectly.
Whenever our Receiving person received a Purchase Order, an Item Receipt was created, and less than a minute later, an email was received by the Requestor.