1. Center for Advanced Process Decision-Making, Dept. of Chemical Engineering; Carnegie Mellon University; Pittsburgh PA 15213
2. Faculty of Mechanical Engineering; RWTH Aachen University; 52056 Aachen Germany
3. Praxair, Inc., Business and Supply Chain Optimization R&D; Tonawanda NY 14150
4. Praxair, Inc., Business and Supply Chain Optimization R&D; Danbury CT 06810