活动历时 meaning in English

activity duration

The chapter of project planning is to characterize the main planning sequence of the project : the scope planning - the scope definition - the action definition - the resource planning - the action sequence definition - the action duration - the cost evaluation - the schedule definition - the cost budget - the project planning . in order to deploy the entire project planning , the secondary planning is necessary : the quality planning , the communication planning , the organization planning , the risk planning , and the purchasing planning
项目计划介绍了按照范围计划-范围定义-活动定义-资源计划-活动排序-活动历时-费用估算-进度计划-费用预算-项目计划制定的主计划顺序，结合质量计划、沟通计划、组织计划、风险计划、采购计划的辅助过程，完整地制定项目计划的过程。