More and more companies rely on external service providers to run their business processes - which do not form part of their core competencies. Technological expertise and a broad portfolio continue to be the most important criteria for selecting a service provider. As part of a comprehensive operation and administration concept, Siemens Information Systems Limited (SISL) offers a full service package, ranging from maintenance through user support and hotline operation, to guaranteed service levels with fixed problem resolution times, as well as maintenance of the current technological state of the art.