本推荐规程描述了如何分析工业和商业电力系统中使用的设备的可靠性数据。介绍了多年来收集的设备可靠性数据。接下来讨论了关键设备可靠性指标，如故障率、每次故障维修的停机时间（以小时为单位）以及启动（运行）的概率。

This recommended practice describes how to analyze reliability data for equipment used in industrial and commercial power systems. Equipment reliability data collected over the years is presented. This is followed by a discussion of key equipment reliability metrics, such as failure rate, downtime to repair in hours per failure, and probability of starting (operating).