Youtube channel Everyday Astronaut just scored an amazing interview with Elon Musk at SpaceX’s Boca Chica development site, where SpaceX is rapidly – and I do mean RAPIDLY – iterating their Starship rocket development program.
During the video, Elon laid out 5 very insightful steps he believes accelerates R&D/product development, listed in strict order of priority. Tim Dodd, the host of Everyday Astronaut, paraphrases Musk’s comments below:
Musk’s Engineering Philosophy:
Musk overviewed his five step engineering process, which must be completed in order:
1. Make the requirements less dumb
The requirements are definitely dumb; it does not matter who gave them to you. He notes that it’s particularly dangerous if someone who is smart gives them the requirements, as one may not question the requirements enough. “Everyone’s wrong. No matter who you are, everyone is wrong some of the time.” He further notes that “all designs are wrong, it’s just a matter of how wrong.”
2. Try very hard to delete the part or process
If parts are not being added back into the design at least 10% of the time, not enough parts are being deleted. Musk noted that the bias tends to be very strongly toward “let’s add this part or process step in case we need it.” Additionally, each required part and process must come from a name, not a department, as a department cannot be asked why a requirement exists, but a person can.
3. Simplify and optimize the design
This is step three as the most common error of a smart engineer is to optimize something that should not exist.
4. Accelerate cycle time
Musk states “you’re moving too slowly, go faster! But don’t go faster until you’ve worked on the other three things first.”
An important part of this is to remove in-process testing after the problems have been diagnosed; if a product is reaching the end of a production line with a high acceptance rate, there is no need for in-process testing.
Additionally, Musk restated that he believes everyone should be a chief engineer. Engineers need to understand the system at a high level to understand when they are making a bad optimization. As an example, Musk noted that an order of magnitude more time has been spent reducing engine mass than reducing residual propellant, despite both being equally as important.
You can find Tim Dodd’s complete commentary page here.
Musk points out that he has repeatedly done this process backwards, to enormous waste of time and effort.
The discussion about the 5 steps starts at 13:25 into the video, linked below: