FWIW, after yesterday's CNBC debacle provided one worthwhile nugget--Tesla's response reiterating Q1 production guidance--I updated my ramp guesstimates, with the following changes based on how 2018 has proceeded thus far plus my gut feeling for the rest of the year. To be clear, these estimates are still worth exactly what you've paid for them--zero. I still enjoy the thought experiment.
I decided that assuming Tesla actually entered 2018 at 1k/week and went up from there was foolish, so I dialed back the start to 600/week and don't hit 1k/week until the 2nd week of Feb. I also dialed back the initial weeks of each successive quarter, assuming that while Tesla will hit its goals of 2500/week by end of March and 5k/week by end of June, each quarter will start out with the first couple of weeks remaining right near the prior quarter's goal. I also updated Q3 and Q4 for Tesla to not meet the 10k/week EoY goal, as they haven't reiterated that lately. I instead now have them at 6500/week at end of Q3, and 9000/week at EoY.
I'm aware that this will probably seem overly conservative to some here, but as overly conservative has won the day so far on the Model 3 ramp, my intention here was to see what 2018 full-year Model 3 production would look like from this angle. I understand that many think that the 5k-10k jump is 'just' adding a second line including all learnings from line 1, and therefore we're likely to see that jump achieved more quickly and with less stress. I would like to agree, but will believe that when I see it play out. Conservative is the word of the day for this exercise.
The good news is it's not all that bad. My 1/3 estimate is quoted above. The updated 1/26 estimate is: 16k in Q1, 47k in Q2, 76k in Q3, and 93k in Q4 for a total as of 12/31/2018 of 234k. This compares to the original 264k in my earlier estimate. The reason I think this is good is that despite all these more conservative changes, the full year has only dropped by 11% and still ends the year well over 200k Model 3s produced. Further, I think Tesla is still likely to deliver over 300k vehicles in 2018--which would be around 200% growth in volume in a single year. Assuming S/X don't grow at all and are right at 100k delivered in 2018, that would require all Model 3s produced by Thanksgiving to be delivered in 2018--certainly doable since they're virtually all US-bound this year.
100k to 300k in a year is still pretty incredible, IMO.