重点放在预防和早期发现的缺陷，测试过程中所描述的这个文本平行软件开发生命周期，以及作者概述了灵活的过程改进软件测试的能力。-Focusing on the prevention and early discovery of defects, the testing process described in this text parallels the software development lifecycle, and the authors outline a flexible process for improving software testing capabilities.