Covalidation of Dissimilarly Structured Models

A methodology is presented which allows comparison between models under different modeling paradigms. Consider the following situation: Two models have been constructed to study different aspects of the same system. One model simulates a fleet of aircraft moving a given combination of cargo and passengers from an onload point to an offload point. A second model is an optimization (linear programming) model, which for given cargo and passenger requirements, optimizes aircraft and route selection in order to minimize late- and non-deliveries. The optimization model represents a much more aggregated view of the airlift system than does the simulation. The two models do not have immediately comparable input or output structures, which complicates a comparison of the two models’ outputs. A methodology is developed to structure this comparison. Two models which compare favorably using this methodology are considered covalid models. We define the covalidity of models in the narrow sense as...

• Type: Conference
• Year: 1997
• Where: WSC
• Authors: Samuel A. Wright, Kenneth W. Bauer Jr.
• Keywords: Methodology, Model, Modeling And Simulation, Narrow Sense, WSC 1997