Dr. JungSook Lee has extensive experience in IT Programming, ERP consulting and Theory of Constraints implementation in Korean industry. Clients include LG Group, Amore Pacific, etc. She has been an adjunct professor at Seoul National University of Science and Technology for 6 years Her doctorate was achieved through the performance evaluation of MRP and DDMRP and is excited to spread the DDMRP way in Korea. She has translated numerous books into Korean including: Necessary But not Sufficient, Critical Chain, Lean Project Leadership and Orlicky’s Material Requirements Planning 3rd Edition.