在产品初步设计中,经常需要评价各种备选方案、材料和日后在保持基本性能特性的同时允许进行产品改进的能力,在导弹产品的改进中,亦会遇到这种情况。本文介绍了一种在导弹设计或建议阶段评价包含要求变更或产品改进的各种备选方案的方法,评估了在保持性能不变的情况下各种备选方案对费用和进度的影响。这对于我们在初步设计阶段初步估计费用和进度风险是有借鉴价值的。 In the initial design of a product, it is often necessary to evaluate various alternatives, materials and the ability to allow product improvements in the future while maintaining the basic performance characteristics that are also encountered in the improvement of missile products. This article presents a methodology for evaluating various options that include requirements or product improvements at the missile design or recommendation stage and assessing the impact of various options on costs and schedule while maintaining the same performance. This is a good starting point for us in the initial design phase of estimating costs and progress risks.