https://www.cnet.com/roadshow/news/tesla-model-3-production-hackathon-elon-musk-2018/

What's a hackathon? Well, essentially it's when a bunch of programmers, subject matter experts, designers, engineers and the like get together for a set period to collaborate intensively on solving a specific problem or set of problems.

The Tesla Model 3 hackathon is focused on solving problems with overly complicated automation on the production line. Musk initiated the event to remove the last roadblocks that are currently slowing production down.