The assumption here is that being good at a job is what 'earns' a promotion. In fact, it can be the opposite; why risk promoting someone to a new role, when th

The assumption here is that being good at a job is what 'earns' a promotion. In fact, it can be the opposite; why risk promoting someone to a new role, when they are doing great at the current one? What actually marks someone for promotion is clear potential for the target role, sometimes despite a not-so-good current performance, indeed sometimes because of it.