Depends on the FMS installed and/or the ability of the navigation system to give the aircraft's position relative to the LLZ. Traffic permitting, I've often requested a no vector ILS and either let the boxes sort it out or used the 10% ground speed/distance to LLZ rule of thumb to make the turn myself. INS and GPS, wonderful inventions, both make it so easy that even a monkey can do it. Reminds me, where did I leave that banana?