It is suprising to me that in consideration of the potential major sources of constraints and the necessary PMs focus on managing them (i.e.cost, time, scope, being the most referred to and then the others as well . . . risk, quality,etc) and that standard project plans (i.e. any artifact referred as a management plan and are subsidiary to the actual "project management plan") that some management plans are identfiied in ITTOs as specific outputs while others are not.