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A2thOS: availability analysis and optimisation in SLAs
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.
Emmanuele Zambon, Sandro Etalle, Roel J. Wieringa
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Model-based qualitative risk assessment for availability of IT infrastructures
In this paper we present the qualitative time dependency (QualTD) model and technique, which is meant to be employed together with standard RA methods for the qualitative assessment of availability risks based on the propagation of availability incidents in an IT architecture.
Emmanuele Zambon, Sandro Etalle, Roel J. Wieringa, Pieter H. Hartel
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