The Multiple Parallel Approach Program (MPAP), under the auspices of the FAA Secondary Surveillance Integrated Product Team, AND-450, was developed to evaluate the feasibility of conducting simultaneous parallel approaches using both current and advanced radar and display system technology. The program focused primarily on the capacity-enhancing benefits of a Precision Runway Monitor system with various airport configurations. MPAP conducted over 20 real-time, human-in-the-loop and fast-time modeling simulations since 1988. The purpose of these simulations was to develop procedures for independent approaches to quadruple, triple, and closely spaced dual parallel runways in instrument meteorological conditions. This report provides a history of all MPAP simulations conducted to date, including a description of the test criteria used to evaluate each test, the findings, and subsequent procedural and equipment recommendations.