Rivian has laid out a huge goal for itself in 2024, and it has a lot to achieve before it gets there.Rivian (RIVN 0.28%) doubled production in 2023, which is a pretty impressive feat. But 2024 won't see a repeat of that success, because the electric vehicle (EV) maker has put production growth on the back burner.Instead, management is focusing on making money. That's an important change, and the fourth quarter is going to be a key test of its success or failure on this front. Here's what you need to know.Ri ...