In view of the lack of research on system software reliability evaluation theory and evaluation method during operation phase,we propose a software reliability evaluation method based on system monitoring log.We used flight inquiry system as the reliability evaluation research object.First,monitoring logs of the system were firstly analyzed,and the failure data extraction method based on monitoring logs was proposed.Second,based on the characteristics of the system and the analysis results of the reliability data,the reliability evaluation model of the flight inquiry system was constructed.Finally,the experiment proves the feasibility of the reliability model.We use this model to evaluate the reliability of the flight inquiry system.The system software reliability evaluation process method is formed.%针对运行阶段的系统软件可靠性评估理论和评估方法的研究缺失,提出一种基于系统监控日志的软件可靠性评估方法.以中国航信的航班查询系统为可靠性评估研究对象,首先解析该系统的监控日志,提出基于监控日志的失效数据提取方法.其次,基于航班查询系统的特点和可靠性数据的分析结果,构建了航班查询系统可靠性模型.最后,实验验证了该可靠性模型是可行的,并利用此模型评估了航班查询系统的可靠性,形成了系统软件可靠性评估过程方法.
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