需求及其变更管理是整个信息系统工程开发过程的基础，也是项目成功的关键因素之一。
Management of requirement and its change is the base of the whole developing process of information system project and one of the critical success factors of the project.
在工厂变更管理系统中接收工程变更，确认无误后启动相应的变更流程。
Receiving change information in plant change management system, initiate running change implementation process when all query identified.
当前的信息工程监理忽视了需求管理的必要性，在信息工程监理中主要做好系统分析、文档审核、需求变更的管理等工作。
The task expatiates the importance of the requirement management, and the job tasks of the system analysis, the document auditing and the requirement changing.
一般由工程部决定ecn，没有工程变更要求管理系统。
It is up to only Engineering to decide for ECN. No systematic ECR feedback.
建立在产品数据管理系统基础上的工程变更管理是指管理处于预发布和发布生命周期状态的产品数据。
Engineering change management, which is basis on product data management (PDM) system, controls the pre-released and released product data.
建立在产品数据管理系统基础上的工程变更管理是指管理处于预发布和发布生命周期状态的产品数据。
Engineering change management, which is basis on product data management (PDM) system, controls the pre-released and released product data.
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