Research on Axiom System and transition Rules of Software Reliability and Safety

In software system, reliability and safety are the most important attributes.In the past, many researches focused on two methods-probability and stochastic processes to predicted the attributes respectively. Comprehensive study of the two attributes is less than other problems,and the methods are often simple and single.In this paper,We study the reliability and safety of software from the states whose changes caused by environmental factors .The axiom system of software reliability and safety is given by formal methods,the transition rules between the two attributes will also be presented .Finally,we will give the logical proof about these rules.