How the Models of Engineering Tell the Truth

Abstract

Models are one of the more important ways in which scientists and engineers understand and engage with the world. Philosophers of science have analyzed how modeling idealizes the world, helps explain events and supports our understanding. I advocate the study of models and modeling practice in engineering. I analyze two classic case studies on flush riveting and control volume analysis from Walter Vincenti as well as a set of models used in the evaluation of levee failures in New Orleans after Hurricane Katrina. Engineers use a variety of different kinds of models and understanding how each model is used to guide understanding is worthwhile. Among the questions raised are how models guide processes of testing and design; what sorts of idealizations do engineers include in their models; and how do engineers use independent models to try to generate robust agreement between model results.