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Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

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Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#301

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I wonder how valuable that charging network will end up being long-term. With the Bolt delivering 238 miles of range, and that number likely to go up some more in the next few years, it seems like a fairly small niche of people that actually benefit from superchargers. Especially as the number of end-point chargers increases. Which isn't to say that it won't be a valuable marketing tool, however -- range anxiety is d…

For one, Tesla superchargers in NorCal and SoCal are insanely busy, with lines and valets during busy hours, so the usage is definitely there. Head over to TeslaMotorsClub forums or Facebook group for owners to witness the mini-dramas playing out regarding hogged supercharger spots. For two, if someone is considering buying a new car, and their daily commute is 3 miles each way, but once a year they take a 200-mile r…

> For one, Tesla superchargers in NorCal and SoCal are insanely busy, with lines and valets during busy hours, so the usage is definitely there. Head over to TeslaMotorsClub forums or Facebook group for owners to witness the mini-dramas playing out regarding hogged supercharger spots.

Oddly enough, two years ago, Hacker News insisted that I was an idiot for driving an ICE hybrid, because of how long it takes to stop for gas.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#302
post #300

Earlier quoted context omitted.

Or maybe they could normally keep lower performing employees around, but cash is getting tighter so they decided to let some of them (less than 4%) go. "Cash being tight" and "firing some employees for performance reasons" are not mutually exclusive.

Are they replacing them, or are they just making everyone else work more for the same pay? How much ramp-up will replacing them require? How will that impact their production rate?

Low performers (and especially the bottom 2%) can often provide negative value to the company. It's quite possible there is no net additional work to distribute, or if there was, that they had additional capacity in the rest of the workforce for the same tasks.

They may not need to be replaced. If they do, we can safely presume they determined those resources (cost / time) involved in doing so were less than what it takes to replace them.

It may not negatively impact their production rate. They may be able to improve their production rate by spending that money in a more targeted way now.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#303
post #124

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"If you can do burst runs of 15 km/hour, that doesn’t mean you can run a three hour marathon." Once you're in 3 hour marathon territory, what you can do for 1 mile is a lot more relevant to what you can do for 26.2 miles than you might think. One of the tent poles of effective marathon/half marathon training is to make your race pace into a drumbeat. You want to feel your race pace in your bones. Very effective worko…

”In Q3, we delivered […] 222 Model 3 vehicles” Assuming they didn’t produce a lot more than they delivered, if they had even one week in which they produced 500 Model 3s, they also must have had weeks in which they destroyed them.

Probably has something to do with pair particle production [1]: 500 virtual Model 3 is produced along with 500 anti-Model 3 then they are immediately annihilated.

[1] - https://en.wikipedia.org/wiki/Pair_production

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#304

Earlier quoted context omitted.

Depends on if it's a 12h or 24h clock.

If it's a 24 hr clock in a 12 hour country it's practically possible to be be right zero times a day.

All 24 hour clocks I have seen were electronic. Broken electronic clock don't show time at all.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#305

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Most auto production lines produce nearly 500 cars per shift . Normal cycle times in an auto plant are about one minute. Here's a Mercedes production line.[1] That's a vehicle on a par with Tesla's products. Something is terribly wrong in Fremont. [1] https://www.youtube.com/watch?v=fbfTlwm248k

That E-class production line video is interesting, it's basically the same assembly strategy Tesla uses: all bits of the engine, drivetrain, suspension etc. is assembled into a "skateboard" in one line, while the body gets fitted with all the trim, interior, doors etc. on another line and then dropped onto the skateboard (which you see from 6:30 and out in the video). If Tesla is stuck on a battery bottleneck it's ju…

That E-class production line video is interesting, it's basically the same assembly strategy Tesla uses: all bits of the engine, drivetrain, suspension etc. is assembled into a "skateboard" in one line, while the body gets fitted with all the trim, interior, doors etc. on another line and then dropped onto the skateboard

The Mercedes E-class is monocoque, like almost all cars. They build the body/frame and then add the powertrain and wheels. Here's the body/frame and the powertrain/suspension coming together.[1] The powertrain and suspension aren't self-supporting; they're a collection of parts held in a fixture. That's very clear in the video of the parts coming together.

The Tesla Model S, though, is body on frame. If it can sit on its wheels without a body, as the Tesla Model S can, it's body-on-frame. Here's the Tesla Model S platform sitting on its wheels, with the powertrain installed.[2]

So is the Tesla Model 3.[3]

[1] https://youtu.be/lPKnM9vC6V0?t=395 [2] https://www.youtube.com/watch?v=l8WUIkD7xxI [3] https://jalopnik.com/why-tesla-needs-to-sell-the-model-3-wit...

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#306
There's good information at the Daily Kanban.[1] They describe what corners Tesla cut, and why it backfired. "Tesla has not yet built a Model 3 using the automated tooling", says one of the people from the company that builds the automated tooling.

Normal testing and tweaking time for a new body assembly line is 6 months to a year, and before that, sections of the line are run in test at the supplier's factory. Tesla skipped all that. It didn't work out well.

[1] https://dailykanban.com/2017/10/source-tesla-responsible-mod...

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#307

Since this came out as part of the Tesla earnings, here's my recap from their earnings release and call.... - Tesla will be late getting up to 5,000 units a week of Model 3. It will happen at the end of Q1 instead of the end of this year. The bottleneck is batteries. - Some lines are at only 500 cars a week. Namely the battery pack assembly, body shop welding and final vehicle assembly. - The $2.92 a share loss was m…

"key elements" of the battery module assembly had to be taken over and redesigned, Musk says. Tesla seems to be taking the opposite approach to Apple here. In my observation, Apple drives its suppliers extremely hard to achieve the quality it requires. Tesla, on the other hand, is too eager to bring any sundry part in house (e.g. car seats). Apple's approach appears to work in that it pushes suppliers to do what's ne…

>Tesla seems to be taking the opposite approach to Apple here. In my observation, Apple drives its suppliers extremely hard to achieve the quality it requires.

Apple earned this right by helping those suppliers get off the ground. With introduction of iMacs/iBooks (~1999) Apple helped build wireless card manufacturing plant in Taiwan from nothing ('few dusty rooms' at their modem supplier manufacturing facility). They did similar thing while shopping for Camera supplier, instead of going with someone established like Sony Apple chose Taiwanese bottom of the barrel volume suppliers (Primax/Micron) and grew their camera module divisions with each iteration of iPhone.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#308

It sounds like they are struggling. Hopefully they can pull it together and turn things around.

They are not struggling. This Yahoo article is fear mongering. I just listened to the whole earnings call and everything sounded terrific: They pulled their best engineers to Gigafactory to mitigate a supplier misleading them about one of their battery production lines, and so they dropped production of S and X. Apparently as a result of the supplier f * up, they rewrote "20 man years of software in 4 weeks". Which i…

Hmm, sounds to me like they are not doing so well. I wish them luck.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#309
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The first two zones of a four-zone process to produce battery packs are being completely reworked, and this is something they only found out about after they were already failing to deliver on promised production goals? I've mis-estimated a lot of things in my career, so I'm trying to be sympathetic, but it seems like someone with production line experience should have been able to test individual parts of the produc…

So I apologize that this is basically assertion based and vague but I need to protect friends a little bit. I went to undergrad for mechanical engineering at a university generally known for turning out good auto industry engineers. A few years out of school (maybe 2010-11?) I noticed a lot of my alumni friends were starting to move from places like Honda, Toyota, GM, etc. to Tesla. These were the friends I would gen…

Fascinating account. Thanks for sharing.

Re: Tesla posts big loss, cuts production of Models X and S to catch up on Model 3

#310
post #274

Earlier quoted context omitted.

This is not an unorthodox or unreasonable position. The Mythical Man-Month is a classic text in software engineering and project management and essentially argues this very point. The analogy to child birth is actually also a classic one made originally by the author. https://en.wikipedia.org/wiki/Brooks%27s_law

Of course just like everyone on HN am aware of the book and heard this quote a billion+ times. And of course I know it's badly misused in this particular case (as it often is).

software development parallelization works about as well as it does for actual software, ie non-linearly at best. Add to that overhead/mistakes/difficulties caused by "synchronization" and you come to the conclusion that a significant amount of that "30 man years" of software had to be just discarded when rebuilt
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