Where the target model is spread across multiple tables, the data Gap Analysis must also consider data keys and key relationships to effectively link data elements together.
如果目标模型跨多个表，数据差异分析还必须考虑数据键和键关系，以便有效地链接数据元素。
But there usually exists a gap which it is difficult to overstep from use case analysis model to other design models in four UML-based models of software system.
然而，通常基于UML的软件系统的四种模型中，从用例分析模型到其它设计模型之间存在一条很难逾越的鸿沟。
A case study shows EPOPM is a feasible model which helps to make reasonable strategy by gap analysis.
为准确把握和评价我国公共组织绩效管理水平，制定合理的策略与措施提供了有效的差距分析依据。
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