The final volume of a six-volume final report (which covers the findings of a research project on policy and technology related to rehabilitation of disabled individuals) examines the methodology and findings of the geometric-simulation modeling effort which support the consequence- and policymaking-analysis efforts of the technology assessment team. Initial sections discuss the general procedure, plan, and strategy of the modeling initiative. The methodologies employed to facilitate model formulation and their relative utility are reviewed. In a section on the models developed, subsections describe the GSIM (geometric simulation model) and Forester-style approaches. A final section summarizes conclusions which corroborate, substantiate, or justify the recommendations found in Volume I (EC 104 673), Chapter 7 and conclusions about the appropriateness of modeling as a contributing component in any technology assessment endeavor. Documentation, including descriptions and listings, of all computer codes developed in the research activity is appended. (SBH)