使用故障树技术分析面向对象的软件

故障树技术已广泛应用于工业系统，然而在软件中的应用较少论及，在面向对象软件中的应用更不多见。本文首先简要介绍了故障树的基本概念，原理和方法，然后将故障树技术引入面向对象软件分析，提出了一种由面向对象软件中消息发送关系图导出故障树的新方法，给出了相应的故障树造算法。

ANALYZE OBJECT-ORIENTED SOFTWARE USING FAULT TREE TECHNOLOGY

Fault-tree technology is used widely in industry syst em s, however its application is less related in software and much less in object- oriented software. This paper simply introduces basic concept, principle and method of fault-tree first, then introduces its application to the analysis of object-oriented software. A new approach that fault-tree of object-oriented software is derived from its flowi ng graph of messages sending is presented and the construction algorithm of fault-tree is given. An algorithm t hat creates cut-set of fault-tree is also described, hence, the combination of basic events causing the failure of to p-event is generated. A method to compute system failure probability (top-event failure probability) by basic event failure probability and to analyze software object-oriented system reliability is given. These methods and algorithms are displayed and verified by a simple example.