PBS and vacation at my old company entailed getting something like 3 hours of pre-award credit over your vacation days. Then the company would build you a line up to the bid window using PBS.
So for example, you have 7 days of vacation and the bid window is 76-84 hours. You get 21 hours credit and then the company populated the rest of your month based on your preferences. In other words, 7 days of vacation would mean maybe 11-12 days off as a result of it.
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