Monte-Carlo simulation and subjective evaluations are used to compare the Analytic Hierarchy Process (AHP) and probabilistic multidimensional scaling (PROSCAL) in the context of selecting the United States' first high-level nuclear waste repository. The simulation assumes a Thurstonian judgment framework as a means of evaluating the perofrmance of AHP/PROSCAL estimation procedures. Simulated factors include the amount of Thurstonian uncertainty and number of decision-makers. The subjective evaluations of the two methods are given by individuals who make both AHP and PROSCAL judgments in a hypothetical nuclear waste repository decision. Various strengths and weaknesses of the two methods are identified.