A novel QoS modeling approach for soft real-time systems with performance guarantees

This paper introduces a systematic approach for modeling QoS requirements of soft real-time systems with stochastic responsiveness guarantees. While deadline miss ratio and its proposed extensions have been considered for evaluating firm real-time systems, this work brings out its limitations for assessing the performance of emerging computer services operating over communication infrastructures with non-deterministic dynamics. This work explains how delay frequencies and delay lengths can be both represented into a single quantitative meaningful measure for performance evaluation of soft real-time constrained computer applications. It also explores the presented approach in the design of scheduling strategies which can ground novel business models for QoS-enabled service-oriented systems.