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
Works in Progress
- A Branch-and-Price Algorithm for the Parallel-line Lot-sizing and Scheduling Problem in Flat-panel Display Manufacturing Process, under review.
- A Robust Optimization Approach for E-bus Charging and Discharging Scheduling with Vehicle-to-Grid Integration, under review.
- Two-stage Robust Optimization Approach for Integrated Supply Chain with Hybrid-dark Stores, under review.
- An Approximate Dynamic Programming Approach to Wafer-lot Scheduling for Parallel Multi-chamber Equipment in Semiconductor Fabrication Lines, under review.
Publications (International)
- Sungwon Hong, Younsoo Lee*, Kyungsik Lee*, Capacity Estimation for Semiconductor Wafer Fabrication Facilities via an Optimization Model based on Flexible Lead Times, IEEE Transactions on Semicnductor Manufacturing, Mar. 2025. (on-line link)
- Younsoo Lee, Kyungsik Lee*, Valid Inequalities and Extended Formulations for Lot-sizing and Scheduling Problem with Sequence-dependent Setups, European Journal of Operational Research 310(1), 201-216, Oct. 2023. (on-line link)
- Younsoo Lee, Kyungsik Lee*, New Integer Optimization Models and an Approximate Dynamic Programming Algorithm for the Lot-sizing and Scheduling Problem with Sequence-dependent Setups, European Journal of Operational Research 302(1), 230-243, Oct. 2022. (on-line link)
- Younsoo Lee, Kyungsik Lee*, Lot-sizing and Scheduling in Flat-Panel Display Manufacturing Process, Omega 93, 102036, Jun. 2020. (on-line link)
Publications (Domestic)
- Mingyu Kang, Donguk Min, Bosung Lee, Younsoo Lee*, Optimization of Electric Bus Charging and Discharging Schedules with Vehicle-to-Grid Technology, The Transactions of the Korean Institute of Electrical Engineers, May. 2025. (In press)
International Conferences
- 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.
- 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.
- 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.
- 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
- 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.
- 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.
- 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.
- 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.
- Younsoo Lee, Kyungsik Lee, “On the Discrete Lot-sizing and Scheduling Problem with Sequence-dependent Setup” in KORMS 2017, Seoul, South Korea, Nov. 2017.
Research Projects (@ SSU)
- 순환 경제를 위한 다중-계층 폐쇄형 공급망 기반 스마트 반품 관리 시스템 개발
- Co-PI, 정석물류학술재단 학술연구지원사업 (2025.01 - 2025.12)
- 스마트 충전 기술 도입에 따른 전기차 충전소 운영 최적화 기법
- PI, 숭실대학교 (2023.05 - 2024.04)