摘要：
Rail，like many project managers,had studied the waterfall model of software development as the primary（主要） software life-cyle process.(Rail，像很多项目经理一样，学过瀑布模型，它是一个重要的软件生命周期过程)He has all set to use it for an upcoming project,his first assignment（分配）.(他准备用瀑布模型来搭建他第一个分配到的项目)However,Ravi found that the .. 阅读全文