在某个信息系统项目中，存在新老系统切换问题，在设置项目计划网络图时，新系统上线和老系统下线之间应设置成(65)的关系。

In approximating costs, the estimator considers the possible causes of variation of the cost estimates， including (75)．

(73) was developed to make clear the interdependence between project tasks before those tasks are scheduled.

Project (74) Management is the Knowledge．Area that employs the processes required to ensure timely and appropriate generation, collection, distribution, storage, relrieval, and ultimate disposition of project information．

Results of quality control measurement are used (72).

以下关于项目总结的描述中，错误的是(70)。

Project work packages are typically decomposed into smaller components called activities to provide a basis for (71), scheduling, executing, and monitoring and controlling the project work.

在某系统集成项目风险管理中，项目经理老阮采用因果图和德尔菲技术对风险进行分析，这表明其正在进行(69)。

以下工程项目风险事件中，属于技术性风险因素的是(68)。

某项目的项目范围已经发生变更，因此成本基线也将发生变更，项目经理需要尽快(66)。

以下对风险的认识中，错误的是(67)。