> Why do you need to compare across teams? Line managers of individual teams usually can't promote people. They can recommend someone for promotion and vouch f

> Why do you need to compare across teams? Line managers of individual teams usually can't promote people. They can recommend someone for promotion and vouch for them. Usually an organization has some quota for promotions. How do you distribute it? One promotion per team? But what if the teams are of different quality (for various reasons). The best dev in one team can be worse than an "average" dev in another team. You don't want to penalize the excellent dev just because they are part of an elite team.