Uncertainty quantification can seem abstract to the uninitiated. For those with experience, though, it is a concrete practice with concrete rules that are driven by concrete problems. To help give a reader a sense for this practice, we provide three examples of uncertainty quantification in action.

The first example is drawn from Dr. Balch's doctoral work; it concerns the quantification and propagation of uncertainty in a Mars atmosphere model. The second is drawn from Dr. Balch's brief stint as a research engineer contracting at Wright-Patterson; it concerns the treatment of legacy wind tunnel data in a validation context. The third and final example is drawn from work done by Dr. Balch over the past three years at Alexandria Validation Consulting, LLC; it concerns collision risk during a satellite conjunction.