[rcktscientist]

The term most use is to "garage". As in, "I'll garage this part while I make the other part, then join them together"
Yes, a kiln is one of the best ways to garage parts. Some people actually use the top of the kiln to keep pieces warm but I'd recommend inside the kiln for COE104.
Also, some people adjust their workflow and simply keep the first piece warm by flashing after adding parts directly, always keeping the temp above the strain point (about 850F for soft glass).