Would it be supply chain management, purchasing, marketing,retail or something else?
I would look closely at programs with the following titles: • Logistics Management • Supply Chain Management • Operations Research or Operations Management • Management Science • Production Management–Production Planning, Scheduling & Inventory Control • etc Needless to say, these are quantitative programs. You will need to hone your mathematics and statistics skills for the modeling work in these programs. I used to love this stuff in the old days. Good luck to you.
