ISO/IEC 15026的本部分规定了完整性等级的概念，以及为显示完整性等级的实现所需满足的相应完整性等级要求。它对定义和使用完整性级别及其完整性级别要求提出了要求，并推荐了方法。它涵盖了系统、软件产品及其元素，以及相关的外部依赖。ISO/IEC 15026的本部分适用于系统和软件，供以下人员使用:a）完整性级别的定义者，如行业和专业组织、标准组织和政府机构；b） 具有完整性级别的用户，如系统或软件的开发人员和维护人员、供应商和收购方、用户和评估人员，以及系统和/或软件产品的管理和技术支持。 诚信水平的一个重要用途是供应商和收单机构在协议中使用；例如，帮助确保交付系统或产品的安全性、经济性或安全性。ISO/IEC 15026的本部分未规定一组特定的完整性等级或其完整性等级要求。此外，它没有规定完整性级别使用与整个系统或软件工程生命周期过程集成的方式。然而，它确实提供了附录A中ISO/IEC 15026这一部分的使用示例。

This part of ISO/IEC 15026 specifies the concept of integrity levels with corresponding integrity level requirements that are required to be met in order to show the achievement of the integrity level. It places requirements on and recommends methods for defining and using integrity levels and their integrity level requirements. It covers systems, software products, and their elements, as well as relevant external dependences.This part of ISO/IEC 15026 is applicable to systems and software and is intended for use by:a) definers of integrity levels such as industry and professional organizations, standards organizations, and government agencies;b) users of integrity levels such as developers and maintainers, suppliers and acquirers, users, and assessors of systems or software and for the administrative and technical support of systems and/or software products.One important use of integrity levels is by suppliers and acquirers in agreements; for example, to aid in assuring safety, economic, or security characteristics of a delivered system or product.This part of ISO/IEC 15026 does not prescribe a specific set of integrity levels or their integrity level requirements. In addition, it does not prescribe the way in which integrity level use is integrated with the overall system or software engineering life cycle processes. It does, however, provide an example of use of this part of ISO/IEC 15026 in Annex A.