本文介绍需求管理的必要性和复杂性之后，阐述了需求管理的目标和原则、需求变更管理和质量保证。
The article introduces the necessity and the complexity of the requirement management, and elaborates its goal and the principle, the requirement change management and the quality assurance.
了解了每个服务实现的复杂性之后，就需要采用一种结构化方法了解应该在SOA项目的什么地方应用数据质量分析。
Given the potential complexity of each service implementation, a structured approach is needed to understand where data quality analysis should be applied in any SOA project.
之后复杂性会急剧上升。
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