Assembly line and other manufacturing processes

So, I'm looking for a word which has to do with manufacturing processing. I know what an assembly line is, but I'm looking for its counterpart (Not sure, though, if it really is its counterpart). In other words, what is the process called when a person or persons assemble some relatively simple gadget or something in a particular spot? I guess there's a specific expression for this, but I haven't been able to find it. Below are just guesses that convey the idea, but I'm sure those are not correct.

Stationary assemblage?
Position assemblage?

Thanks!