Francisco Zenteno Smith is a Senior Operations Research Scientist at American Airlines and the creator of SEFOP — the Software Engineering Framework for Optimization, a free, open-source project that gives OR teams the software engineering foundations their graduate training never provided. After a decade building optimization systems for hospitals, retailers, and manufacturers in Chile, Francisco kept seeing the same symptom: the mathematics worked, but the software was fragile. A single new business rule could take weeks to implement and break things that had been working. When he returned to school for a master's in computer science at UC San Diego, he realized those problems had names — and that the Computer Science field had spent fifty years solving them. These fixes had not yet ...