They need to hit their immediate goal of 2,500/week by end of Q1 - see the last chart on that page. They didn't move this goal in the Q4 earnings call, which was surprising - but if this tracker is accurate the production curve seems to be on track.

They are also planning to bring in a fully automated assembly line being shipped from Europe, in March. Assuming nothing goes wrong there it is supposed to accelerate production even more.