A manager’s job is to guide a team to deliver results, and she’s able to do that well in a sustained way — not because she exhibits power, control, or authority, but because she nurtures and enhances a set of human relationships around her. What’s more, she’s developed those relationships by crafting a long-term vision. Doing so can extend the life of employees at your company, but also bring clarity to how and when they should embark on the next stage in pursuit of their dreams.