Do Yeon Lee

Former MASc Student

Image of Do Yeon Lee
I received my BASc in Chemical Engineering from the University of Waterloo in 2015. The aim in my research is to study scheduling optimization methodologies and applicationofvarious Mixed Integer Linear Programming (MILP) formulations for industrial sized problems. We are currently working with an industrial partner in the analytical services sector. In particular, I have explored, and will continue to look for ways to effectively handle various type of uncertainties that may become realized, for example, uncertainties inprocessing capacities, that can be explicitly considered in the optimal schedule. There are several methods that can be implemented to handle uncertainties for optimization, such as stochastic optimization, and robust optimization; however, implementation of those methods can significantly increase computational time, and/or result in overly conservative solutions. In our group, we are also actively looking for ways to solve deterministic versions of these scheduling problems through implementation of efficient discretization of the multiple time scales of a non-uniform discrete time formulation, and smart design of the objective function. Being able to solve deterministic scheduling models faster will allow us to add more features to the model such as consideration of uncertainties, and simultaneous scheduling of both machine and human resources.

Thesis: Solution Strategies in Short-term Scheduling for Multitasking Multipurpose Plants