The big thing is usually what do various folks mean by ‘improve’? ‘As small as possible’? (Aka optimistic) ‘As accurate as possible’? (Aka as low variance) ‘

The big thing is usually what do various folks mean by ‘improve’? ‘As small as possible’? (Aka optimistic) ‘As accurate as possible’? (Aka as low variance) ‘As conservative as possible’? (Aka least likely to ever be exceeded) ‘As cheap to estimate as possible’? (Aka lowest overhead) Most people have no idea which strategy they are even doing.