本指南旨在为设计和开发中早期考虑可测试性方面提供指导，并帮助确定有效的测试程序，作为操作和维护的一个组成部分。第二版为技术修订版。它扩展了第一版中概括的技术和系统，并提供了更多细节。

This guide has for purpose to provide guidance for the early consideration of testability aspects in design and development, and to assist in determining effective test procedures as an integral part of operation and maintenance. This second edition constitutes a technical revision. It expands and provides more detail on the techniques and systems broadly outlined in the first edition.