1.1 本指南确定了需要进行经济分析的建筑设计和建筑系统决策的类型，并推荐了可用于为每种决策类型实施适当经济方法的ASTM实践、附件和计算机程序。 1.2 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 ASTM发布了衡量建筑物和建筑系统投资经济效益的标准实践。 可以使用一个计算机程序来生成符合这些实践的经济措施。 4. 折扣 因素 桌子 已由ASTM发布，以便于计算大多数实践的性能指标。 4.2 本指南可用于:( 1. )确定需要经济分析的建筑设计和系统决策类型；( 2. )将技术上合适的经济方法与决策相匹配；和( 3. )在第节列出的ASTM实践和附件中找到方法 2. . 4.3 多种方法在技术上适用于许多建筑决策。因此，在实践中，用于评估特定建筑决策的技术上合适的经济方法的选择通常取决于用户的角度。 影响用户的因素示例如下:( 1. )易于应用这些方法( 2. )用户对方法的熟悉程度( 3. )用户对不同方法的偏好，以及( 4. )项目存在预算限制。 4.4 本指南确定了在不同条件下可能影响用户选择的方法的一些特性和局限性。

1.1 This guide identifies types of building design and building system decisions that require economic analysis and recommends ASTM practices, adjuncts, and computer programs that may be used to implement the appropriate economic methods for each decision type. 1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Standard practices for measuring the economic performance of investments in buildings and building systems have been published by ASTM. A computer program that produces economic measures consistent with these practices is available. 4 Discount Factor Tables has been published by ASTM to facilitate computing measures of performance for most of the practices. 4.2 This guide can be used to: ( 1 ) identify types of building design and system decisions that require economic analysis; ( 2 ) match the technically appropriate economic methods with the decisions; and ( 3 ) locate the methods in the ASTM practices and adjuncts listed in Section 2 . 4.3 More than one method can be technically appropriate for many building decisions. Therefore the choice in practice of which technically appropriate economic method to use for evaluating a particular building decision will often depend on the perspective of the user. Some examples of factors that influence the user are: ( 1 ) ease of applying the methods, ( 2 ) level of familiarity of the user with the methods, ( 3 ) preference of the user for different methods, and ( 4 ) presence of budget limitations for the projects. 4.4 This guide identifies some features and limitations of the methods that might influence users' choices under varying conditions.