prototype
early sample or model built to test a concept or process, generally used to evaluate a new design by system analysts and advanced users
en-US/ˈpɹoʊtoʊˌtaɪp/
en-GB/ˈpɹəʊtətaɪp/
early sample or model built to test a concept or process, generally used to evaluate a new design by system analysts and advanced users