This paper discusses the challenge and the experiences of re-engineering legacy police IT systems and transforming them into well orchestrated and coordinated Web Services. The author uses the Web Services Flow Graph (WSFG) to analyses the issues associated with Web Services composition, orchestration, as well as Quality of Service (QoS). The issues related to publishing an aggregated service, and to advertising collective service capabilities, unified interface, a coordinated behaviour, and most importantly, the combined Service Level Agreement (SLA) and QoS, is the main focus of discussion in the rest of paper.
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