Operational systems, especially those hosted on mainframe computers, have always been known for handling transactions safely and securely, at any time of day or night, with virtually unlimited availability. They've run the nuts and bolts of many businesses for years. But these days it's not sufficient for operations to simply take orders, process payments or book flights. They need to be able to understand the dynamics around those orders (if we offer free shipping on this order will it boost customer lifetime value?), know for certain if those payments are legitimate or fraudulent while they are still in flight, or decide when an automatic upgrade will enhance overall business results. Without, of course, lengthening the duration of any interaction with the client. The extremely high volume of transactions processed by these operational systems makes it imperative that operational decisioning be built directly into the operational systems themselves. Fortunately for all those operational systems hosted on the mainframe, the technology has been put in place to do just this. This Decision Management Solutions paper explains how.