Statement of Research Interests

Robert L. Hoffman

Institute for Systems Research
University of Maryland, College Park, MD 20742

My research interests lie in the areas of integer programming, operations research modeling, and data anlaysis, with an emphasis on aviation applications. I have been able to make contributions to integer programming and stochastic optimization while providing practical models for use in air traffic flow management. One of these models superimposes side constraints on an underlying assignment model in order to minimize flight delay while holding together banks of flights during an FAA-issued ground delay program. Another model is designed to help the FAA cope with the stochastic nature of airport arrival capacity during periods of inclement weather. These models raised many interesting issues in integer programming such as facet representation, relative strengths of alternative formulations, total unimodularity and network duality.

As an analyst with Metron Scientific Consulting, Inc., my work in aviation applications continues, covering topics such as the replacement of existing heuristics and procedures with optimization models, statistical and historical analyses of air traffic flow initiatives, modeling traffic into the major airports, and developing metrics for aviation performance. This work is done in conjunction with NASA and the joint project between the FAA and the airlines, Collaborative Decision Making (CDM). I continue my affiliation with the Center of Excellence by helping to coordinate research activities with the University Maryland research.

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