质量控制通常被视为是事后活动：即检查是否达到质量(要求)和采取措施纠正任何缺陷的工具。
Quality control is often regarded as a post-event activity: i. e. a means of detecting whether quality has been achieved and taking action to correct any deficiencies.
工程质量主要是依靠事后的验收、整改等措施，质量控制过分依赖设计部门和设备供应商；
The project quality mainly depend on the measures of afterwards check and correct, and the quality control excessively relies on the design department and the equipment supplier;
数字馆藏的质量控制措施分为事前、事中和事后服务质量控制措施。
Measures for the quality control of digital collection services include the measures for the quality control before, during and after the services.
并就此分析了虚拟参考咨询项目事前控制、事中控制及事后控制，以期加强服务质量控制。
And to analyse the virtual reference service projects prior control, a matter of control and subsequent control, with a view to strengthening the quality of service control.
并就此分析了虚拟参考咨询项目事前控制、事中控制及事后控制，以期加强服务质量控制。
And to analyse the virtual reference service projects prior control, a matter of control and subsequent control, with a view to strengthening the quality of service control.
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