Mathematics
Beyond the required courses, one should include MATH 3653 (Discrete Math II), MATH 4553 (Linear and Nonlinear Programming), MATH 4663 (Combinatorial Math), and MATH 5133 (Stochastic Processes).
Statistics
STAT 4203-4213 (Math Stat I-II); or, STAT 4033 (Engineering Statistics) and STAT 4113 (Introduction to Probability Theory).
Computer Science
COMSC 2113-2133 (Computer Science I-II).
Industrial Engineering
INDEN 3703 (Engineering Computation and Interactive Modeling) and INDEN 4014-4023 (Operations Research I-II).