Model-based Methodology and Framework for Assessing Service and Business Process Availability

In the world where on-demand and trustworthy service delivery is one of the main preconditions for successful business service and business process, availability is of the paramount importance and cannot be compromised. This chapter presents a framework for modeling business process availability that takes into account services, the underlying ICT-infrastructure and people. Based on a fault model, the chapter develops the methodology to map dependencies between ICT-components, services and business processes. The mapping enables automatically derived appropriate availability models and analytically assessed steady-state, interval and user perceived availability at all levels, up to the level of the business process. The chapter demonstrates the applicability of the mapping using two case studies. Finally, it defines a roadmap towards model-based service management and position this work within its context.