Component-Based Software System Reliability Allocation and Assessment Based on ANP and Petri

There are various dependencies in the component-based software systems. ANP can describe the complex structure of system using network representation for system structure. Therefore, it can assign reliability target to each component by comparing the relative importance to the users and considering constraints cost. However, ANP method can only estimate software system reliability statically and indirectly in the design stage. During the service process of software, how to assess the software system reliability, and further to validate the rationality of software reliability allocation in the design stage are dynamic problems, which require a dynamic method. In this paper, firstly, the dynamics model for state changes of software system reliability over time is developed using Petri network, then the software system reliability can be assessed dynamically combined with the dependency graph of components. Finally, the allocation and assessment for component-based software system reliability by ANP combining Petri network is presented and discussed by one example.