1. Dept. of Industrial, Manufacturing and Systems Engineering, Texas Tech Univ., Lubbock, TX 79409; Dept. of Reliability Engineering, Delek US Holdings, Big Spring, 8328 E. County Rd. 113, Midland, TX 79720 (corresponding author).
2. Dept. of Industrial Engineering, Cullen College of Engineering, Univ. of Houston, Engineering Building 2, Room E206, 4222 Martin Luther King Blvd., Houston, TX 77204.
3. Professor, College of Business, Zayed Univ., P.O. Box 144534, Abu Dhabi, United Arab Emirates.