There’s one big reason to keep policy separate from procedure. We often make updates to how we do things. (Ideally by streamlining our processes!) While procedures are frequently in flux, overarching policies shouldn’t change quite as much. Approaching the two separately might make it easier to communicate what’s changing and what’s staying the same. The flip side is—policy and procedure should be closely aligned. Having related documentation can make it easier for everyone to follow the rules of the road, on a macro and micro level.