[mreome]

Goals. You work with management to define what needs to be done by when, then set your schedule to maximize your personal productivity to meet those goals. You generally can't really have that kind of flexible schedule without organized/effective management. But it can be a win for Management because the idea is that each employee is maximizing their own productivity, potentially letting the employee have more free time (while still meeting goals) which makes them happier, more well rested, and thus even more productive. In the long-term your more productive employee will get more done.