Forms :: Using Subform To Add Progress Reports To Main Form Record?

Basically, I've created a form to track maintenance requests for specific types of equipment. Basically it's like a ticketing system.

Once a user creates the request, I want to use a subform (I guess this is the best way) to let them add data to that specific main form record to track the progress of the request until the repair is made and the "ticket" is closed out.

Do I need to create another table for the "progress reports" (for lack of a better term) or should this be done using some sort of an append query?

I've seen plenty of sample databases where they have a box within a form that looks like a datasheet where these types of "update" notes can be added and then submitted with the click of a button, but I've never been able to get at the code behind it.