This book is a complement to Supply Chain Network Design (http://networkdesignbook.com/) by the same authors and will help you get started writing optimization code in OPL, IBM’s math programming language for CPLEX. It opens with the very basics—you don’t have to know anything about writing math programs to begin. Unlike other basic books on math programming, this book focuses just on the facility location problem. This allows the authors to introduce more advanced modeling techniques and build upon the simple models in the early chapters. In addition, the book also introduces ideas from software engineering to help you build more robust and commercial grade code. This book is perfect for an introduction class to optimization or for someone who wants to teach themselves how to build mathematical models. Assumes the reader has a working version of the IBM ILOG CPLEX Studio product.