中文摘要：

对近几十年中用于正确评估预测软件系统可靠性的主要模型进行了回顾性研究。对基于模型采用的数学x--g．，将文献中的模型分为解析性模型和启发性模型。再对于模型假设以及模型主要思想进行了研究和分析。最后对软件系统可靠性模型研究趋势和存在的问题进行了展望。

英文摘要：

An overview study was made on prime software reliability models proposed by the researchers in the last decades for accurate reliability analysis and forecasting. Firstly, the major models are classified into the analytic models and the heuristic models based on their mathematical theories. Secondly, studies and analyses on the model assumptions and main ideas are presented in this paper. Finally, the current trends and existing problems in the software reliability models are addressed.