USDOT Region V Regional University Transportation Center

Dr. Madanat Delivers Seminar at the University of Illinois at Urbana-Champaign

May 14, 2010

Dr. Samer M. Madanat (University of California at Berkeley) delivered a lecture on May 7, 2010 at the University of Illinois at Urbana-Champaign, as part of the NEXTRANS Seminar Series.  The seminar, titled, "RELIABILITY-BASED OPTIMIZATION OF MAINTENANCE AND REPLACEMENT POLICIES FOR A HETEROGENEOUS SYSTEM OF INFRASTRUCTURE FACILITIES," was held from 2 - 3 p.m., 1105 Siebel Center (201 North Goodwin Avenue, Urbana, Illinois). 

This research addresses the determination of optimal maintenance and replacement policies for a heterogeneous system of facilities. The problem of optimizing maintenance and replacement policies at the system level is formulated in a reliability-based framework, based on policies that are optimal at the facility level. The facility-level policies are determined using a finite-state, finite horizon Markov decision process in which the state of the Markov chain contains information on the history of maintenance and deterioration. Optimality conditions for the continuous-case system-level problem are explained intuitively. A numerical study shows that the results obtained in the discrete-case implementation of the solution are valid approximations of the continuous-case results. The computational efficiency of the system-level solution makes the formulation suitable for systems of realistic sizes.

Samer Madanat is the Xenel Distinguished Professor in the Department of Civil & Environmental Engineering, and the Director of the Institute of Transportation Studies at the University of California at Berkeley. He received a B.Sc. in Civil Engineering from the University of Jordan in 1986, and an M.S and Ph.D. in Transportation Systems from MIT in 1988 and 1991 respectively. His research and teaching interests are in the area of Transportation Infrastructure Management, with an emphasis on modeling facility performance and the development of optimal management policies under uncertainty. He has published extensively in refereed archival journals and conference proceedings. In 2000, he received the Science and Technology grant from the University of California Office of the President, an award given annually to one faculty member in the UC system. Since 2001, he has served as the Editor-in-Chief of the ASCE Journal of Infrastructure Systems. Several of his former students are faculty members at universities in the US and abroad.


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