A comprehensive expert-judgment elicitation methodology to quantify input parameter uncertainty and analysis tool uncertainty in a conceptual launch vehicle design analysis has been developed. The ten-phase methodology seeks to obtain expert judgment opinion for quantifying uncertainties as a probability distribution so that multidisciplinary risk analysis studies can be performed. The calibration and aggregation techniques presented as part of the methodology are aimed at improving individual expert estimates, and provide an approach to aggregate multiple expert judgments into a single probability distribution. The purpose of this report is to document the methodology development and its validation through application to a reference aerospace vehicle. A detailed summary of the application exercise, including calibration and aggregation results is presented. A discussion of possible future steps in this research area is given.Unal, Resit and Keating, Charles and Conway, Bruce and Chytka, TrinaLangley Research CenterAEROSPACE VEHICLES; DESIGN ANALYSIS; ESTIMATES; METHODOLOGY; EXPERT SYSTEMS; RISK; PROBABILITY THEORY; JUDGMENTS; CALIBRATING; AGGREGATES; LAUNCH VEHICLES...