1. a Department of Industrial Engineering , Florida A & M/Florida State University College of Engineering , P.O. Box 2175, Tallahassee, Florida, 32307, USA
2. b Department of Industrial and Management Systems Engineering , University of South Florida , Tampa, Florida, 33620, USA
3. c Department of Industrial Engineering and Systems , Virginia Polytechnic Institute and State University , Blacksburg, Virginia, 24061, USA.