1. a Grado Department of Industrial and Systems Engineering , Virginia Polytechnic Institute and State University , Blacksburg, Virginia 24061-0118, USA
2. b Department of Industrial Engineering , 4207 Bell Engineering Center, University of Arkansas , Fayetteville, AR 72701, USA
3. c Department of Industrial and Information Engineering , University of Tennesse , Knoxville, TN 37996, USA
4. d Department of Biomedical, Industrial and Human Factor Engineering , Wright State University , Dayton, OH 45435, USA
5. e Volvo Trucks North America , 4881 Cougar Trail Road, Dublin, VA 24084, USA