Crude oil blend scheduling optimization: an application with multimillion dollar benefits-Part 2

摘要

To facilitate more specific information on the formulation we must first talk about the problem variables. These can be classed into continuous and combinatorial variables. Continuous variables are the quantity and quality variables, and the combinatorial variables are the logic or discrete variables. There are also auxiliary or intermediate variables such as startup (and shut-down or switchover) and flow times yield variables that are used to support solving both the logistics and quality subproblems. Bounds and constraints associated with these variables follow.