1.1 该分类为成本估计提供了通用分类系统，并为将该分类应用于成本估计提供指导。 1.2 这种分类将成本估算的阶段和阶段映射到一个通用的成熟度和质量矩阵，该矩阵与项目定义的程度有关，可应用于各种行业。 1.3 成本估算分类系统的开发方式如下: 1.3.1 提供对成本估算分类所涉及概念的共同理解； 1.3.2 定义并关联成本估算分类中使用的主要特征，以及； 1.3.3 使用项目定义程度作为用于对估算类别进行分类的主要特征。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 使用这种分类将改善参与编制、评估和使用成本估算的所有利益相关者之间的沟通。 4.2 使用成本估算的各方经常误解可用于编制成本估算的信息的质量和价值、估算过程中使用的各种方法、估算的准确性水平以及与估算相关的风险水平。 4.3 该分类将项目定义程度作为确定估算分类的主要特征。 4.4 使用这种分类将有助于参与项目估算的人员避免对各类成本估算的误解，并避免其误用和失实陈述。通过避免因误解成本估算及其所代表的内容而导致的不适当的业务和财务决策、行动、延误或争议，改进有关估算分类的沟通可以减少业务成本和项目周期时间。 4.5 该分类旨在具有通用性，因此为任何行业的成本估算分类提供了一个系统。还参考了具体行业的成本估算分类，适用于:AACE International，Process Industry 18R-97和AACE International的Building/General Construction Industry 56R-08。 4.6 估算分类在用作实践的附件时提供了有价值的额外报告信息 E1804 .

1.1 This classification provides a generic classification system for cost estimates and provides guidelines for applying the classification to cost estimates. 1.2 This classification maps the phases and stages of cost estimating to a generic maturity and quality matrix, keyed to a degree of project definition, that can be applied across a wide variety of industries. 1.3 The Cost Estimate Classification System has been developed in a way that: 1.3.1 Provides a common understanding of the concepts involved with classifying cost estimates; 1.3.2 Defines and correlates the major characteristics used in classifying cost estimates, and; 1.3.3 Uses the degree of project definition as the primary characteristic used to categorize estimate classes. 1.4 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 Use of this classification will improve communication among all the stakeholders involved with preparing, evaluating, and using cost estimates. 4.2 The various parties that use cost estimates often misinterpret the quality and value of the information available to prepare cost estimates, the various methods employed during the estimating process, the accuracy level expected from estimates, and the level of risk associated with estimates. 4.3 This classification applies the degree of project definition as the primary characteristic for determining an estimate’s classification. 4.4 Using this classification will help those involved with project estimates to avoid misinterpretation of the various classes of cost estimates and to avoid their misapplication and misrepresentation. Improving communications about estimate classifications reduces business costs and project cycle times by avoiding inappropriate business and financial decisions, actions, delays, or disputes caused by misunderstandings of cost estimates and what they are expected to represent. 4.5 This classification is intended to be generic and so provide a system for the classification of cost estimates in any industry. There are also references to specific industries, for cost estimate classification as applied in: AACE International, Process Industry 18R-97, and AACE International, Building/General Construction Industry 56R-08. 4.6 Estimate classifications provide valuable additional reporting information when used as an adjunct to Practice E1804 .