The A&E Simulator is a planning tool. It shows how patients flow through the A&E department; how they occupy the different treatment spaces; and when they are treated by the medical and nursing staff. The A&E Simulator can be fed with a patient arrivals file that has been downloaded from the A&E computer system, replaying patients' arrivals as they actually happened. Repeated simulation experiments with different "what if" scenarios that explore different space and staffing configurations show what needs to be done to reach the NHS 4 hour waiting time standard in a consistent manner.

The Beds&Theatres Simulator is used on a daily basis to support admissions planning activities. It reads a waiting list download from PAS and calculates the best order in which to admit patients during a simulation period encompassing the ensuing weeks or months, taking into account the twin variables of bed and operating theatre availability. The underlying model is pre-populated with virtual patients who will arrive as emergencies during the simulation period, ensuring that appropriate provision is made for such patients. Provision is also made for the continual addition of virtual patients with high clinical priority that are likely to be added to the waiting list during the period of simulation and who will require treatment before some of the real patients already on the waiting list. Where there are bays within wards that can be either male or female, the model optimises the distribution of the sexes between bays. The model enforces specialty preferences in regard to which ward to admit a patient.