Visualisation and calculation tools for assessing risks associated with service level agreements
Service level agreements stipulate the percentage of time that a service can be down during a certain period of time, such as one month, without the service provider incurring sanctions. Knowing how big their risk of an SLA sanction is and which component they should focus on at any given time is valuable information for service providers. The level of risk that exists at any given time depends on the service level maintained until that time and any faults that have occurred in components.
VTT has developed a solution that can be used to monitor the status of system components and the accumulation of service downtime in a dynamic fashion and to communicate how critical each component is from the perspective of the SLA at any given time using colour-coded diagrams. The solution is based on visualisations of the reliability structure of systems and historical data on system faults. The visualisation and the fault history can be used to calculate dynamically the significance of each component in terms of how likely it is to malfunction or how urgently it needs to be fixed in the event of a fault.
The solution was described in an article:
Pirkko Kuusela, Ilkka Norros. Dynamic approach to service level agreement risk. 9th International Conference on Design of Reliable Communication Networks, DRCN 2013.
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Other tools for assessing and monitoring the dependability of telecommunications networks
VTT has also studied different aspects of network dependability in the course of various research projects in collaboration with numerous Finnish businesses. For more information, visit http://iplu.vtt.fi. Other examples of new approaches include the Dependability Case approach to the assessment of IP networks, a networking requirements specification system and a concept for risk-aware networking.