本推荐规程描述了如何使用概率方法对工业和商业电力系统进行可靠性分析。对于在可靠性领域经验有限的电力工程师来说，这可能是最有价值的。它还可以帮助所有负责工业和商业电力系统电气设计的工程师。

This recommended practice describes how to use probability methods for conducting a reliability analysis of industrial and commercial power systems. It is likely to be of greatest value to the power-oriented engineer with limited experience in the area of reliability. It can also be an aid to all engineers responsible for the electrical design of industrial and commercial power systems.