"… . when a company multiplies in size, the management jobs become brand-new jobs. As a result, everybody needs to requalify for the new job, because the new job and the old job are not the same. Running a two-hundred-person global sales organization is not the same job as running a twenty-five-person local sales team. If you get lucky, the person you hired to run the twenty-five-person team will have learned how to run the two-hundred-person team. If not, you need to hire the right person for the new job. This is neither an executive failure nor a system failure; it is life in the big city. Do not attempt to avoid this phenomenon, as you will only make things worse."

— Key piece of advice from Ben Horowitz’s excellent book, The Hard Thing about Hard Things: Building a Business When There are No Easy Answers.