Grounded assessment begins with establishing the goals of an institution and its users, but there is an added layer of complexity in determining value at the consortial level, where individual institutions will naturally perceive the value of a particular resource differently. The shared resources of a consortium are also often diverse in both format and acquisition method. How should the relative value between e-books and streaming media be compared? Between leased and demand-driven acquisitions? Between open access and collaboratively owned models?