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21837 A2thOS: availability analysis and optimisation in SLAs
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Zambon, Emmanuele and Etalle, S. and Wieringa, R.J. (2012) A2thOS: availability analysis and optimisation in SLAs International Journal of Network Management, 22 (2). pp. 104-130. ISSN 1055-7148 *** ISI Impact 0,681 ***

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Information technology (IT) service availability is at the core of customer satisfaction and business success for today's organisations. Many medium- to large-size organisations outsource part of their IT services to external providers, with service-level agreements describing the agreed availability of outsourced service components. Availability management of partially outsourced IT services is a non-trivial task since classic approaches for calculating availability are not applicable, and IT managers can only rely on their expertise to fulfil it. This often leads to the adoption of non-optimal solutions. In this paper we present A2THOS, a framework to calculate the availability of partially outsourced IT services in the presence of SLAs and to achieve a cost-optimal choice of availability levels for outsourced IT components while guaranteeing a target availability level for the service.

Item Type:Article
Research Group:EWI-DIES: Distributed and Embedded Security, EWI-IS: Information Systems
Research Program:CTIT-ISTRICE: Integrated Security and Privacy in a Networked World
Research Project:CASTOR: Controlling Access to SCADA Networked Systems, HERMES: Host-based Event Mining in SCADA systems, MIDAS: Intrusion detection for SCADA
Uncontrolled Keywords:A2THOS, SLAs
ID Code:21837
Deposited On:31 May 2012
ISI Impact Factor:0,681
More Information:statisticsmetis

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