Using at least two sources, describe why these outcomes were either positive or negative

Promoting Internally

At one time, the idea of an organization promoting from within was seen as all good with no downside. But is it true that this is really the best way for an organization to go? Consider a time when you saw someone promoted and it was a positive situation, and think of one instance in which the outcome was not so positive. Using at least two sources, describe why these outcomes were either positive or negative