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| 2003.2-2023.1 | Professor, Department of Industrial Engineering, Yuan-Ze University,Taiwan, R.O.C. |
| 2022.2-2022.7 | Professor and Chair, Department of Industrial Engineering & Management, Yuan-Ze University,Taiwan, R.O.C. |
| 2004.8-2010.7 | Professor and Chair, Department of Industrial Engineering & Management, Yuan-Ze University,Taiwan, R.O.C. |
| 2003-2004 | Professor, Department of Industrial Engineering and Management, Yuan-Ze University,Taiwan, R.O.C. |
| 1990-2002 | Associate Professor, Department of Industrial Engineering, Yuan-Ze University,Taiwan, R.O.C. |