Abstract: A method and system providing an improved technology for efficiently computing experimental design in strict statistically controlled settings. The method and system utilize a unique combination of statistical algorithms for designing, comparing the performance, and conducting multi-arm, multistage experiments efficiently, while radically reducing the computation time required on a personal computing device, thereby improving computer technology and performance. In particular, the method and system enable personal computing devices to compute very large multi-arm multistage experiments in a significantly reduced period of time. The present invention allows experimentalists to examine in a single statistically controlled experiment a vastly greater range of experimental options, with the possibility of dropping uninformative arms of the experiment, changing goals and parameters during the course of the experiment.