Donna L. Gresh IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (greshus.ibm.com). Dr. Gresh received her B.S. degree in engineering in 1983 from Swarthmore College and her M.S. and Ph.D. degrees in electrical engineering in 1985 and 1990 from Stanford University, where she studied the rings of Uranus using data from the spacecraft Voyager. She joined the IBM Thomas J. Watson Research Laboratory as a Research Staff Member in 1990 and spent twelve years conducting research in scientific and information visualization. Since 1992, Dr. Gresh has been a member of the Mathematical Sciences Department, with research interests in the area of workforce optimization.

Daniel P. Connors IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (dconnorsus.ibm.com). Dr. Connors received his B.S.E. degree in electrical engineering from the University of Michigan in 1982, and his M.S. and Ph.D. degrees in electrical engineering from the University of Illinois in 1984 and 1988, respectively. Since 1988, he has been a Research Staff Member at the IBM Thomas J. Watson Research Center. Dr. Connors has worked on modeling, simulating, and designing business processes and developing decision support tools for manufacturing and supply chain logistics. He is a member of the Mathematical Sciences Department at the Research Center, where he is currently working on developing business processes and workforce management optimization tools.

John P. Fasano IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (jpfasanous.ibm.com). Mr. Fasano is a Senior Technical Staff Member and Manager of the Optimization and Mathematical Software group in the Mathematical Sciences Department at the IBM Thomas J. Watson Research Center. He received a B.S. degree in computer and system engineering in 1978, an M.S. degree in computer science in 1979, and an M.S. degree in operations research and statistics in 1983, all from Rensselaer Polytechnic Institute. He joined IBM in 1979. Before joining the IBM Research Division in 1992, Mr. Fasano worked in several IBM development organizations that had responsibility for the operating system of an early IBM Intel-based machine, vectorizing compilers for numerically intensive applications, and the development of Optimization Subroutine Library (OSL). In 1990, he taught for a year in the Mathematics Department at Grambling University. Mr. Fasano's current interests include supply chain optimization and open source math programming software tools. His current work includes reverse logistics and service personnel planning.

Robert J. Wittrock IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (wittrockus.ibm.com). Dr. Wittrock is a Research Staff Member in the Department of Mathematical Sciences at the IBM Thomas J. Watson Research Center. He received his Ph.D. degree in operations research from Stanford University in 1983. He joined the IBM Research Division that same year and has generally worked in the area of applying optimization and heuristic techniques to supply chain management problems. He currently has primary responsibility for the ongoing design and implementation of the resource-constrained planning software known as Watson Implosion Technology.