they send the majority of their cars to the east coast of north america. 2nd month to middle north america and 3rd month goes to west coast/Vancouver. This is smart delivery logistics, not really a wave.
I think this is pretty much the definition of wave deliveries.
Inventory reduction rather than direct logistics expenses is the main advantage to reducing the quarterly wave. I only realized this recently.
I agree with this from the quarterly financials reporting point of view.
The problem with the wave that I see and want to see get eliminated is that the wave in deliveries is, fundamentally, to target a particular point on the calendar every 3 months when inventory gets minimized. That's at the expense of inventory going higher the rest of the time.
The other problem is that unless the delivery teams have significant and important work to do the rest of the time (not just make work but serious value add work similar to delivering cars), and heck even if they don't, the delivery wave creates a cram session. Now and then - what the heck. But having it built into the business model for 1 month out of 3 to have deliveries concentrated leading to people working overtime - that is at best inefficient.
Assuming the simplistic shipping pattern above, the east coast is probably doing the bulk of its deliveries from week 2 through 6 in the quarter. That is their cram session, and then they're done as there are few cars still coming in. However given that they have sufficient parking space to store cars prior to delivery they have some flexibility to spread that out and avoid cramming in deliveries - maybe week 2 through 10.
The middle of the country probably gets its cram session started around week 6 and goes through 10. Again like the east coast they can probably stretch that out to the end of the quarter, with only those final deliveries by the end of the quarter having a particular timeline on them.
The west coast has about 4-6 weeks (again, simplifying down to the pattern above - I don't really think its this simple) from start of cars arriving for delivery and when they need to be delivered, at least to make the end of the quarter. This is where the cram session is the worst as there's no slack for getting stuff done by end of quarter.
Tesla ends up spending extra money on overtime, stressing out employees, and worsening the delivery experience for new owners, in exchange for making the company financials look as good as possible at a specific point in time. At this point the financials are good enough to unwind the wave. Ship cars to the east coast at a steady cadence that keeps the delivery team there occuppied at a steady pace. Heck - maybe that means a smaller delivery team is needed. Or maybe service techs don't get pulled off of service calls in order to help with deliveries (I don't know one way or the other that this happens - only that that's a group of Tesla employees that will have the knowledge to assist).
The likelihood of a bad delivery experience for new customers goes down - delivery people don't need to cram each new car delivery in such a rush. I know I'd like my own delivery experience to be what it needs to be if I'm plunking down $50k (or whatever) for a new car. Feeling like I'm in an assembly line with a # of minutes to get my new car and get out of the way for the next person - not a good experience on such a large purchase. (This view on delivery is more based on what I know was going on in the past - I suspect it is much better these days only because I haven't been hearing about it for seemingly a year+).
At the very least the overtime and extra stress goes down.
And I believe, though I haven't worked out the numbers, that the actual inventory levels throughout the quarter will go down. Not just the inventory number on 4 days of the year.