ABSTRACT
Requirements originate from many sources in varying forms, both explicit and implicit. The design assumption that enabled the decomposition of the “Perform Mission Operations” function was the concept of a separate spacecraft bus. The generation of the Operations Concept is initiated during the development of the functional description of the system. One important reason is competitiveness. A customer is generally more concerned with obtaining the functionality and performance levels desired than with the way in which that functionality is implemented. The task of analyzing the requirements set for problems is obviously a Rework Discovery activity. Allocation involves not only technical elements, but also the cost and schedule components of the system development. There are also several managerial activities that are associated with the allocation activity. Data released prematurely will result in more rework generated than data released in good condition, albeit later on the timeline.
