Research Interests

• 경영과학 방법론을 적용하여 생산, 물류, 에너지, 서비스 등 다양한 산업에서 발생하는 문제를 해결하는 일체의 과정
  • 스마트 생산시스템 (Smart Production Systems) 구축, 생산계획 수립 및 스케줄링
  • 전기자동차 충전소의 설계 및 운영 최적화
  • 자동화된 물류 창고 (Robotic Mobile Fulfillment Systems)의 운영 최적화
• 경영과학 및 최적화 이론 및 해법
  • Theory: Polyhedral Analysis, Valid Inequalities, Extended Formulation
  • Algorithm: Cutting plane, Branch-and-Cut, Branch-and-Price, Benders Decomposition
• 불확실성 하에서의 순차적 의사결정 기법
  • Approximate Dynamic Programming
  • Stochastic Programming & Robust Optimization
  • Reinforcement Learning

Publications

2023

Valid inequalities and extended formulations for lot-sizing and scheduling problem with sequence-dependent setups

Younsoo Lee, Kyungsik Lee

European Journal of Operational Research  ·  01 Oct 2023

lot-sizing and schedulingvalid inequalityextended formulation

2022

New integer optimization models and an approximate dynamic programming algorithm for the lot-sizing and scheduling problem with sequence-dependent setups

Younsoo Lee, Kyungsik Lee

European Journal of Operational Research  ·  01 Oct 2022

lot-sizing and schedulingapproximate dynamic programming

2020

Lot-sizing and scheduling in flat-panel display manufacturing process

Younsoo Lee, Kyungsik Lee

Omega  ·  01 Jun 2020

lot-sizing and schedulingOLED display

Works in Progress

1. “Branch-and-price Algorithm for Parallel-line Lot-sizing and Scheduling in Flat-panel Display Manufacturing Process”. with Jinyeong Jeong, Seyoung Oh, Kyungsik Lee.
2. “An Optimization Model based on Flexible Lead times for Capacity Estimation in Semiconductor Wafer Fabrication Facilities”. with Sungwon Hong, Kyungsik Lee.
3. “Approximate Dynamic Programming Algorithms for Capacitated Lot-sizing Problem with Stochastic Demand”. with Kyungsik Lee.
4. “Reinforcement Learning Approach for Dynamic Non-shareable Resource Allocation Problem under Order Uncertainty. with Seyoung Oh, In-Beom Park, Jongyoon Park, Kyungsik Lee.

International Conferences

1. Younsoo Lee, Kyungsik Lee, “Valid Inequalities and Extended Formulations for Single-period Relaxation of Lot-sizing and Scheduling Problem” in EURO 2022, Espoo, Finland, Jul. 2022.
2. Sungwon Hong, Younsoo Lee, Kyungsik Lee, “An Optimization Model based on Flexible Lead Times for Semiconductor Wafer Fabrication” in EURO 2022, Espoo, Finland, Jul. 2022.
3. Younsoo Lee, Kyungsik Lee, “New Integer Optimization Models and Approximate Dynamic Programming Algorithm for the Lot-sizing and Scheduling Problem with Sequence-dependent Setups” in IFORS 2021, Seoul (virtual), South Korea, Aug. 2021.
4. Younsoo Lee, Kyungsik Lee, “On the Discrete Lot-sizing and Scheduling Problem with Sequence-dependent Setup” in ISMP 2018, Bordeaux, France, Jul. 2018.

Domestic Conferences

1. Sungwon Hong, Younsoo Lee, Kyungsik Lee, “An Optimization Model based on Flexible Lead Times for Semiconductor Wafer Fabrication” in KIIE 2022, Jeju, South Korea, Jun. 2022.
2. Jinyeong Jeong, Younsoo Lee, Kyungsik Lee, “A Decomposition Approach for the Parallel Line Lot-sizing and Scheduling Problem with Sequence-dependent Setup and Item Family” in KIIE 2021, Seoul, South Korea, Nov. 2021.
3. Younsoo Lee, Kyungsik Lee, “New Integer Optimization Models and Approximate Dynamic Programming Algorithm for the Lot-sizing and Scheduling Problem with Sequence-dependent Setups” in KIIE 2020, Seoul, South Korea, Nov. 2020.
4. Younsoo Lee, Kyungsik Lee, “An Extended Formulation Approach for the Lot-sizing and Scheduling Problem with Sequence-dependent Setups and Production Run Limit” in KIIE 2018, Seoul, South Korea, Nov. 2018.
5. Younsoo Lee, Kyungsik Lee, “On the Discrete Lot-sizing and Scheduling Problem with Sequence-dependent Setup” in KORMS 2017, Seoul, South Korea, Nov. 2017.