Here is an interview with Jack Levis from UPS discussing predictive vs. prescriptive analytics. He actually discusses more about implementation of ORION in figuring out the best route to deliver. Despite the low scholarly value of the article, it's nice to read what UPS does to improve their system.
"Our digital journey started with an early adoption of data and analytics tools for improving our operations. As our operations became more complex and distributed in nature, the focus has been to improve business processes, increase efficiency and cut costs. We had been following a descriptive and predictive analytics-based system for a long time but what has recently changed is our shift to prescriptive analytics. I can safely say that UPS is one of the few companies to effectively use prescriptive analytics to gain insight for successful optimization."See the entire January issue of "Digital Transformation Review" here: http://ebooks.capgemini-consulting.com/Digital-Transformation-Review-5/files/assets/common/downloads/Digital-Transformation-Review-5.pdf