A project life cycle is a collection of generally sequential project ______ whose name and number are determined by the control needs of the organization or organizations involved in the project. The life cycle provides the basic ______ for managing the project, regardless of the specific work involved. Perfect大型信息系统集成项目组建了一个变更控制委员会来负责项目变更请求的审查与处理工作，并且确立了支配其运作的具体程序和规则。这个程序要求所有得到批准的变更都必须反映到______中。