This dissertation demonstrates the interdisciplinary integration of critical appreciative inquiry (a qualitative planning process focused on inclusion in decision-making) and multi-attribute utility theory (a quantitative evaluation process focused on rationality in decision-making). Principles of positive psychology and decision-making underlay the resulting model used in this proposal to evaluate a sample of programmatic initiatives of Ohio University's LGBT Center. Results from this work reveal the usefulness of deriving evaluation criteria from an organization's mission statement and are expected to generalize to other such centers. Implications for diversity leaders in higher education are advanced. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]