定义与土方机械可用性相关的公认术语和定义（定义见ISO 6165），以帮助沟通和理解此类术语。附录A提供了一种识别待使用和标准化术语字段的方法，以澄清术语之间的关系。这些术语分为可用性术语、可靠性术语、故障术语、可用性术语和时间术语。术语使用英语和法语，字母索引使用英语和法语。

Defines the generally recognized terms and definitions relating to the availability of earth-moving machinery (as defined in ISO 6165) to assist in the communication and understanding of such terms. Annex A provides a means of identifying the field of terms to be used and standardized, to clarify the relationships between the terms. The terms are grouped into availability terms, reliability terms, failure terms, serviceability terms, and time terms. Terms are in English and French, alphabetical indexes are given in English and French.