The dissertation discusses the design change influence on quality, time, and cost during the period of development phase, manufacture phase, and sale phase.

• 对设计变更影响度分析按照设计开发阶段的变更、制造阶段的变更和产品已经投放市场的变更，围绕变更的质量管理、时间管理和成本管理进行论述。