Education

• 1974.2 Seoul National University Physics B.S.
• 1980.12 Ohio State University Industrial Engineering M.S.
• 1984.8 Ohio State University Industrial Engineering Ph.D.

Research experience

• 1984 ~ 1988 : Assistant Professor, Univ, of New Brunswick, Canada
• 1988 ~ 1989 : Assistant Professor, Dept, of Management Science, KIT
• 1989 ~ 1991 : Undergraduate Program Chairman, Dept. of Management Science, KAIST
• 1991 ~ 1992 : Department Chairman, Dept. of Management Science KAIST
• 1993 ~ 1994 : Vice President, Faculty Council, KAIST
• 1989 ~ 1995 : Associate Professor, Dept, of Management Science, KAIST
• 1995 ~ 1997 : Professor, Dept, of Industrial Management, KAIST
• 1997 ~ current : Professor, Dept, of Industrial Engineering, KAIST

Research area

Major projects

• 기계고장시 작업취소가 발생하는 대기행렬 모형의 분석, 학술진흥재단, ’98-’99
• 1단계 전이를 하는 확률과정에서의 평형방정식의 확장, 학술진흥재단, ’99-’2000
• 2차원 척도를 사용하는 시스템의 신뢰도와 보증정책에 관한 연구, 과학재단, ’97-’98
• 다양한 서비스 정책 하에서 마코비안 도착과정을 갖는 대기행렬 시스템의 확률적 분석, 학술진흥재단

Selected publications

• Reversed Absorbing Markov Chain : A Sample Path Approach , OR Letters, 16, 41-46, 1994
• /G/1 Vacation Models with N-Policy : Heuristic Interpretation of the Mean Waiting Time, J. of Operational Research Society, 46, 258-264, 1995.
• Estimating Parameters of the Power Law Process with Two Measures of Failure Time, J. of Quality Technology, 30, 127-132, 1998.
• A Note on the GI/M/1 Queue with Poisson Negative Arrivals, J. of Applied Probability, 38, 1081-1085, 2001.
• An Arrival Time Approach to M/G/1-Type Queues with Generalized Vacations, Queuing Systems, 38, 91-100, 2001.
• A Two-Moment Approximation for the GI/G/C Queue with Finite Capacity, to appear in INFORMS J. on Computing.
• An Invariance Relation and a Unified Method to Derive Stationary Queue Length, To Appear in Operations Research.

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