向开发案例中添加的每一项元素都应该根据期望的效益进行平衡，您需要考虑的方面包括：时间节省、质量获得，或为项目评估、计划和范围管理提供的基础。

Each addition to the development case should be balanced with the expected benefits in terms of time saving, quality gain, or providing a basis for project estimation, planning, and scope management.

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从成本效益的角度评估质量管理系统的充分性来判断其是否支持组织的战略和目标。

Evaluate the adequacy of the quality management system to determine whether it supports the organization's strategies and objectives in a cost-effective manner.

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采用目前美国国家海洋局（NOAA）推荐的双边界二分式条件价值评估方法，对北京市空气质量改善产生的健康效益进行评估。

The double-bounded dichotomous discrete contingent valuation method recommended by US NOAA was applied to evaluate health gains from air quality improvement in Beijing.

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