The State Planning System (SPS) is a policy-oriented management tool intended to help analyze the interrelated effects of alternative policies and their relationships to state goals. Two pilot-test case studies are described--the SPS tuition policy evaluation conducted in Colorado, and New York's SPS evaluation of the applicability of large scale quantitative models to general postsecondary education policy-making situations. Each case study also contains supporting appendices providing the mathematical equations and other details related to the SPS design employed by each state. (Author/CMV)