1. Systems Integration Div., National Inst. of Standards and Technology, Gaithersburg, MD 20899-8260 US (Corresponding author), e-mail: leet@nist.gov
2. Indian Inst. of Information Technology Design and Manufacturing (IIITD&M), Chennai 600127, IN
3. School of Business, George Washington Univ., Washington, DC 20052 US
4. Laboratory for Manufacturing and Sustainability, Univ. of California, Berkeley, CA 94720 US
5. Systems Integration Div., National Inst. of Standards and Technology, Gaithersburg, MD 20899-8260 US
6. Dept. of Industrial and Manufacturing Engineering, Pennsylvania State Univ., Univ. Park, PA 16802 US
7. Advanced Manufacturing Office, Office of Energy Efficiency and Renewable Energy, Dept. of Energy, Washington, DC 20585 US
8. The George W. Woodruff School of Mechanical Engineering, Georgia Inst. of Technology, Atlanta, GA 30332 US