> Engineers and director-level staff from Tesla reviewed the lists, the person said. Layoff lists were drawn up and ranked based on individuals’ contributions to Twitter’s code during their time at the company, the people said. The assessment was made by both Tesla personnel and Twitter managers.
Using outside people who never contributed to the company to judge who in the company actually contributed. This is Elon going the "hire business consultants to tell you bullshit you want to hear" way but instead of business consultants he is cheaping out and hiring people from his other companies to act as them.
This process sounds shambolic