The Algorithm

Elon Musk runs design reviews at Tesla and SpaceX on a five-step process his teams call the Algorithm, always in the same order: question every requirement, delete any part or process you can, simplify and optimize, speed up the cycle, and automate last. Walter Isaacson lays out the steps and their exact wording in his 2023 biography, where Elon Musk recites them in production meetings like a checklist. The order matters as much as the steps, because automating too early is the mistake the method exists to prevent.

What is The Algorithm?

The five steps run in a fixed order. First, question every requirement, and make each one carry the name of the person who set it, never a department. Second, delete any part or process that can go, knowing some may be added back later. Third, simplify and optimize what is left. Fourth, speed up the cycle. Fifth, automate. Isaacson records a saying that goes with the steps: the only fixed rules are the laws of physics, and everything else is a recommendation.

Why It Matters to Elon Musk

The method came out of a painful year at Tesla. During the Model 3 “production hell” of 2017 and 2018, Elon Musk tried to automate almost every step on the Fremont and Nevada lines, then watched the over-built machinery slow the factory down. In April 2018 he posted that excessive automation at Tesla was his mistake and that humans are underrated. Isaacson records a later admission: the error was starting with automation before anyone had questioned the requirements, deleted parts, and fixed the bugs. The Algorithm is the rule he wrote so he would not make that mistake again.

How it Works in Practice

In a meeting the steps become questions asked in order. The first is who set a requirement and whether it is true. Isaacson notes Elon Musk's warning that requirements from smart people are the most dangerous, because people are less likely to question them. The deletion test is harsh on purpose: if a team does not end up adding back at least 10 percent of what it cut, Isaacson quotes him, it did not cut enough. Only then does the team simplify what survives, speed up the line, and hand repetitive work to robots.

The Evidence

SpaceX's Raptor 3 engine moved the plumbing and wiring that once hung on the outside into the engine body, which let SpaceX delete the external heat shield. The engine is about 230 pounds lighter than Raptor 2 and produces about 50 more tons-force of thrust.

Tesla shows the same pattern in the body shop. By casting large sections of the car in one piece, it replaced about 70 stamped and welded parts with one casting.

The Algorithm Today

The method runs across Elon Musk's companies. At SpaceX it drives Raptor and Starship, where the goal is fewer parts and faster build cycles. At Tesla it shapes the cars and the factories that make them. Isaacson lists rules that travel with the steps: every technical manager has to keep hands-on experience, and being too friendly is treated as a risk, because close teams find it hard to challenge each other's work.

What Comes Next

The method points toward more deletion first and more automation later. As Starship matures, SpaceX aims to keep cutting the part count before it pushes for mass production. At Tesla the casting approach has spread to more of each vehicle, and the Cybercab is built with the unboxed process, which assembles large sections of the car in parallel. The method asks for patience: a process gets questioned, stripped down, and simplified before any machine is bought to run it.

The Bottom Line

The Algorithm is a five-step checklist whose force is in its order: question, delete, simplify, accelerate, automate. It came out of Tesla's Model 3 ramp in 2018, and SpaceX and Tesla still apply it to Raptor engines and car bodies.