Realistically there's a point where you haven't interviewed enough people and another when you've interviewed so many you're wasting time. Do you need the glob

Realistically there's a point where you haven't interviewed enough people and another when you've interviewed so many you're wasting time. Do you need the global optimum candidate, or do you need a very good candidate? If you need the global best then you're probably better off headhunting than posting a job listing.