What it takes to survive at Tesla during a production ramp-up, according to the man who launched the Model S

Those people will no doubt occupy a special place in Tesla's legacy, helping to execute CEO Elon Musk's vision of mainstreaming the electric car.

It is safe to conclude that it takes a certain kind of person to successfully carry out stretch mandates handed down by Musk, arguably one of the most ambitious tech, transportation, and environmental visionaries of our time.

A former Tesla engineer who managed the launch of the Model S offered some insight about who succeeds at Tesla at a time such as this, when the company is bringing a new car to market.

Be a manufacturing genius, or be an idea machine

Hokuto Ueda, a Harvard Business School graduate who was on the team that took the Model S from prototype to delivery and launched Tesla's Gigafactory, told Business Insider in an interview that, based on his experience, people who are experts in manufacturing are the ones who excel at Tesla, above all others.

"They're the types who got their start at established automakers like Toyota," Ueda said. "They're very well-versed in traditional manufacturing, but they can understand that the circumstances are different at Tesla."

"You have to unlearn some of what you know from previous experience and be flexible enough to come up with new ideas," Ueda said. He worked at Tesla for five years before leaving in 2015 to start Drivemode, a Panasonic-backed startup whose app turns smartphones into infotainment systems for cars that don't have the latest tech.

Indeed, Tesla's main assembly plant in Fremont, California, is a perfect demonstration of new ideas. It's considered one of the most technologically advanced production facilities on the planet and it's equipped with more than a hundred robots tasked with assembling the Model 3, Model S, and Model X.

"The second type of people who thrive during a production ramp-up at Tesla," Ueda said, "are people who are like I was when I first started there. I had never worked in a factory before. I was an automotive engineer, but I was designing electronic components. I knew very little about manufacturing."

Ueda said that helped him go into the process of building the first Model S cars with a clean slate and no hang-ups about how things should go.

"You’re not really tied to industry practices. You’re able to think flexibly," he said. "Of course, a combination of the two engineering mindsets are very much necessary to avoid big mistakes, especially around safety and things like that. But the philosophy is different."

The electric-car company has struggled to reach production targets in the past, but still, Musk said previous experience should make Model 3 production go more smoothly.

To hell and back again

During Tesla's Model 3 handover event in Fremont on Friday night, Musk offered an honest assessment of the challenges that lie ahead for production. "Frankly, we're gonna be in production hell," Musk said jokingly.

But, with an estimated 500,000 Model 3 pre-orders on the books, he really wasn't kidding about hell:

"That's gonna be where we are for at least six months. Maybe longer. But, you guys know that — you're veterans — you've been through this. So, I look forward to working alongside you, journeying through hell."

Musk told Business Insider's Matt DeBord earlier Friday that the Model 3 hell will be less hellish than the hells Tesla endured when it launched the original Roadster, the Model S and the Model X.

Musk took a more valiant tone on the matter later that evening at the big event: "As the saying goes, if you're going through hell — keep going."