A key indicator of today's global business system supported by Service Oriented Architecture (SOA), is the reliability and uptime. This concern is crucial for e-commerce sites and mission-critical business applications. SOA modelling is used to implement the concept of Digital Business Ecosystem (DBE). In computing environment of DBE a chain of components link business applications together, and the strength of this chain, in terms of reliability and performance, will determine the success or failure of the business. One way to make the chain stronger is to increase the reliability of all components involved, especially the critical components of the chain. In this paper, we address the reliability issue of Digital Ecosystem's transactions. The major contribution of this research is to propose a framework for reliable transactions in DE, via the analysis of the reliability for web services computing.