1. A computer system for enhancing the performance of underlying policies and execution-rules of real-world activities, comprising: a demand input section for providing demand information to drive the system; a real-time software application having a series of discrete steps for implementing the underlying policies and execution-rules of the activities and for converting the demand information into instructions; a simulation-time operations-simulation model for implementing the underlying policies and execution-rules of the activities and which receives the instructions; a control section comprising a synchronization clock for synchronizing the discrete steps of the software application with the operations-simulation model by delaying the execution of some of the discrete steps and for communicating the instructions from the software application to the operations-simulation model; and an output section for outputting data for enhancing the performance of the underlying policies and the execution-rules of the activities.