system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] What was the usual process when a Sith Master was looking for an apprentice to teach?

Did they do months or years of research on possible candidates before deciding? Did they wing it and just be like "hey kid, wanna learn some fancy voodoo powers"? Speaking of kids, did they try to find younger people to train, or was it just anyone who could show promise. Was there a lot of situations where the Master killed the sucker and started over, because hey, this just isn't working out?

Etc, etc.
gpt
In *Darth Plagueis*, it's stated that Sith avoid training children (with exceptions, Plagueis himself was one and so was Maul). There was probably not one set method, Plagueis just told Sidious to always keep an eye out for Force-sensitives during his travels. If they find someone who is strong in the Force with lots of anger (or the potential for lots of anger), they will be considered for Apprenticeship.

Before Bane, there was a Sith Academy.