This paper discusses a plan for developing a meaningful approach to analyzing mass property uncertainties for each phase of an aerospace vehicle life. Users of a mass property uncertainty analysis are identified. How the application of these values by the users impact vehicle performance and cost is illustrated as a basis for establishing requirements for a meaningful uncertainty analysis technique. Arguments are developed to illustrate the need for acceptance of a universal method and the need for cooperation of the weight engineers throughout industry to develop the method of mass property uncertainty analysis.