消除与产品/服务在其预期生命周期内的效用有关的任何问题。调整原型以符合所需的质量和可靠性标准。进一步完善原型，以便对其进行测试。 Eliminating any problems relating to utility of the product/service over the course of its expected lifetime. Tweak the prototype in order to comply with the required quality and reliability standards. Further refine the prototype, so it may be subjected to testing.