> Be usable is as vague as possible :) > I was thinking in terms of landmarks. Ok, another way: like the > Mozilla team - no regressions from the past version. > > Would this work better? > Like this: Priority Milestone Item P1 B1 improve memory usage P2 B1 no unplanned regressions in web compatibility P2 B1 no regressions in browsing speed / page load times