A Compositional Approach to Performance Modelling by Jane Hillston

By Jane Hillston

This is often the 1st booklet proposing a stochastic extension of method algebra, PEPA; this can be proven to be compatible for specifying a Markov strategy, that could then be utilized to functionality modelling. the tactic, that is illustrated with case stories taken from the world of communique structures, can conveniently be used to build numerous versions that may be analysed utilizing common numerical strategies. one of many significant merits of PEPA over the normal tools for specifying stochastic functionality versions is the inherent equipment for reasoning in regards to the constitution and behavior of types. within the later chapters this gear is exploited to outline 4 equivalence relatives over PEPA elements. each one of those notions of equivalence has intrinsic curiosity from a procedure algebra viewpoint. even if, also they are proven to be beneficial in a functionality modelling context. To finish the e-book, a piece has been further surveying fresh ends up in the world and discussing open questions.

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Extra resources for A Compositional Approach to Performance Modelling (Distinguished Dissertations in Computer Science)

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There is no magic formula; much will depend on the nature of organization, its view on technology as an enabler, its business strategy, and its historical view on IT spending. One of the most important guides, not only to the degree of IT spending but also to the organization’s general attitude toward IT, is the organizational type. Gartner Group5 classifies organizations into three types in terms of technology adoption, as follows: Ⅲ Type A. Type A organizations are always considering the risk of adopting new technology against the rewards of competitive advantage.

Key Definition: Information Architecture. The structure (including interdependencies and relationships) of information required and in use by the organization. Business Systems Architecture Business systems architecture (BSA) describes the business systems and principal information stores required to support the IA. The BSA provides an initial prediction of the reuse or enhancement of current (sometimes referred to as ‘‘legacy’’) systems and information and the development of new business systems.

Organizations were able to make strategic product choices based on alliances with a small number of vendors. The domination of Microsoft at the desktop (and then the server) aided this architectural approach. ’’ The academic community had been using this tool for decades, but the arrival of the World Wide Web commoditized access, dramatically improving accessibility. This event also began a swing back to industry standards. The IETF had been setting standards for much of the Internet’s life—in fact, it was the cornerstone of its success.

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