本文件根据ISO/IEC/IEEE 12207:2017，6.4.13中定义的维护过程及其活动和任务，提供软件维护指南。此外，本文件更详细地描述了维护过程，并确定了各种维护类型的定义。这包括使用相同维护资源对多个软件产品进行维护。除非另有说明，本文件中的“维护”指软件维护。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document provides guidance for the maintenance of software, based on the maintenance process and its activities and tasks defined in ISO/IEC/IEEE 12207:2017, 6.4.13. Moreover, this document describes the maintenance process in greater detail and establishes definitions for the various types of maintenance. This includes maintenance for multiple software products with the same maintenance resources. "Maintenance" in this document means software maintenance unless otherwise stated.All current amendments available at time of purchase are included with the purchase of this document.