Architecture-Based Reliability Modeling of Web Services Using Petri Nets

Reliability of web applications depends on reliability of the application itself as well as the underlying application server, external and internal services. Many research works have been conducted on reliability modeling of service-based software, which concentrate on internal services located in the organization. The purpose of this in-progress study is to analyze the reliability of service-based software using internal and external services. Petri net modeling is employed in evaluating the reliability of the composite software. The main challenge is obtaining and aggregating the reliability of all components forming the system architecture. It is conjectured that differentiating between internal and external reliability models can lead to more accurate reliability prediction.