Several high-level extensions have been introduced for Petri nets (PNs). Coloured Petri nets (CPNs) are the most famous high-level extensions of PNs. Stochastic activity networks (SANs) are a stochastic generalization of PNs. These models have widely been used for dependability and performability evaluation purposes and are supported with a few powerful modeling tools. To provide some high-leve...

Haverkort, B.R., Approximate performability and dependability analysis using generalized stochastic Petri nets, Performance Evaluation 18 (1993) 61-78. Since current day fault-tolerant and distributed computer and communicat ion systems tend to be large and complex, their corresponding performability models will suffer from the same characteristics. Therefore, calculating performability measure...

If computing system performance is degradable then, as recognized in a number of recent studies, system evaluation must deal simultaneously with aspects of both performance and reliability. One approach is the evaluation of a system's "performability" which, relative to a specified performance variable Y, generally requires solution of the probability distribution function of Y. Prior work on p...

Abstract A methodology for performance assessment of prestressed concrete (PSC) girder bridge system, based on strain monitoring in limited number girders, is proposed this paper. The uses Polya urn model determining probabilities the system being different condition states with respect to loss prestress. Performability measure used describing system. state assigned from a predefined set states...

In this paper we discuss a unified approach towards model-based quantitative evaluation of both computer systems and communication systems. In the area of fault-tolerant computer systems, dependability evaluation has been recognized as being a topic of importance, both to judge a system on its merits and to provide trust in the actual dependability of the system. In communication systems, the n...

In modern telecommunication networks, services are provided through Service Function Chains (SFC), where network resources implemented by leveraging virtualization and containerization technologies. particular, the possibility of easily adding or removing has prompted service providers to redefine some concepts including performance availability. line with this new trend, we propose a performab...

Service provisioning mechanisms implemented across 5G infrastructures take broadly into use the network service chain concept. Typically, it is coupled with Network Function Virtualization (NFV) paradigm, and consists in defining a pre-determined path traversed by set of softwarized nodes to provide specific services. A well known chain-like framework IP Multimedia Subsystem (IMS), key infrastr...

A distributed system is a complex system. Developing complex systems is a demanding task when attempting to achieve functional and non-functional properties such as synchronization, communication, fault tolerance. These properties impose immense complexities on the design, development, and implementation of a distributed system that incur massive effort and cost a large amount of money. Therefo...

Stochastic methods are commonly used for dependability evaluation. In the mid 1970’s, stochastic evaluation was proposed for combined performance/dependability evaluation, called performability evaluation. Extending reliability evaluation to include performance related behaviors presented new challenges, most notably due to the large difference in time scale of performanceand dependability-rela...