For example, (Moment == "ordering") can be used to check if the current moment is Ordering moment. What are the values for all other moments, specifically Service Group Review and Service Group Authorization moments?
The values for Service Group Review moment is "streviews" and Service Group Authorization moment is "stauthorizations".
You are correct that these are not in the designer documentation. One way you can find them is through view page or frame HTML source when the service form is in that particular moment, and look for the word "Moment".