1. A method for reducing development, integration and testing time of a spacecraft implemented with one or more reconfigurable processor boards (RPBs), comprising the steps of: modeling functionality of the spacecraft using mission design tools and based upon mission requirements; generating a configuration for the spacecraft; validating the configuration against mission requirements by simulating the configuration using a simulation and analysis tool; programming one or more RPBs based upon the configuration; interfacing the one or more RPBs to other end item components defined by the configuration to form the spacecraft; generating one or more operational scripts based upon the configuration and the simulation; and integrating and test the spacecraft using the operational scripts.