[] () used to describe a way of developing a new product where the process is divided into separate stages. At the end of each stage managers must make a decision about whether and how to continue. 阶段─关卡流程（用以分阶段开发新产品的一种方法）⨁a stage-gate model / process / review / system 阶段─关卡流程模型／过程／审查／体系