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. 一项新的国家标准出台，Perfect项目经理意识到新标准中的某些规定将导致其目前负责的项目必须重新设定一项技术指标，该项目经理首先应该______。