Training manual for Elements of Interface Definition and control

Establishing a system that ensures that all interface parameters are identified and controlled from the initial design activities of a program is essential. It is not necessary that the fine details of these parameters be known at that time, but it is very important that the parameters themselves are identified, that everything known about them at that time is recorded and controlled, and that voids I are identified and scheduled for elimination. The latter requirement is of primary importance to the proper design of any interface. Initial bounding of a void and scheduled tightening of those bounds until the precise dimen- sions or conditions are identified act as a catalyst to efficient design and development. An enforced schedule for eliminating voids is one of the strongest controls on schedule that can be applied (ref. 3).