Acknowledgements and disclaimer

We gratefully acknowledge supporters of our work, which include IBM, the National Science Foundation, the Office of Naval Research, the Logistics Institute at Georgia Tech, and the Graduate School of Business at the University of Chicago.

These pages represent our personal opinions and not necessarily those of the organizations that have sponsored our work. We offer this information as a public service; but nothing here should be construed as professional engineering advice, which would require familiarity with your specific operation.