Open, Closed, and Mixed Networks of Queues with Different Classes of Customers
Journal of the ACM (JACM)
BT Technology Journal
BT Technology Journal
Self-adaptive middleware: Supporting business process priorities and service level agreements
Advanced Engineering Informatics
Proceedings of the 2nd ACM/SPEC International Conference on Performance engineering
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Management of performance risk is achieved by using performance engineering techniques. A major weapon in the performance engineering armoury is performance modelling. Modelling means prediction — estimating the performance of a new system, estimating the impact of change on an existing system or estimating the impact of a change of workload on an existing system. This paper describes how IT systems performance modelling fits into the overall performance engineering approach and its role in performance prediction and risk management. It then focuses on a recent case study illustrating why a particular modelling technique was used, how it was used, and the outcome of the modelling exercise.