Is the damage output in raids calculated alphabetical?

If you didn’t write the algorithm than how you know how it is calculated?i don’t undestand the tiebreaker you are saying,Kyno said it’s based on rng which is not its obvious..my main question is how players with starting name lower in alphabetical order always are above me...guildies said it’s based on time the user exit the raid which is not as I read in other posts.