Evaluating a computer system

As these simulated entities visit the various system elements, they accumulate individual and system statistics. Computer-system evaluation Computer-system evaluation The evaluation of performance, from the perspectives of both developers and users, of complex systems of hardware and software.

Evaluation of computer history

Modern computer-based information systems have become increasingly complex because of networking, distributed computing, distributed and heterogeneous databases, and the need to store large quantities of data. See Client-server system , Multiprocessing The design and development of complex software systems is a time-consuming and expensive task. Links to Primary Literature Additional Readings The evaluation of performance, from the perspectives of both developers and users, of complex systems of hardware and software. One goal is to estimate the resource consumption of software under development so that performance models can be used to influence the architecture of the software under development. People are relying increasingly on computer systems to support daily activities. You may already have access to this content. Hybrid models combine both analytic and simulation approaches by, for example, replacing an entire subsystem in an analytic model by an equivalent device whose input—output behavior is obtained by simulating the subsystem. Better estimates on the resource consumption are obtained as the software development process evolves. Also, if the air-missile tracking system fails to detect an enemy missile in sufficient time to launch a counterattack, the system manifests performance failure. Link to this page:.

For example, if an information system takes a longer time than users are willing to wait for the records they requested, the system is said to fail performance-wise even though it may eventually retrieve the correct set of records.

When these systems fail, significant breakdowns may ensue. People are relying increasingly on computer systems to support daily activities. Therefore, in designing a computer system it is necessary to guarantee that the end product will display neither functional nor performance failure.

Modern computer-based information systems have become increasingly complex because of networking, distributed computing, distributed and heterogeneous databases, and the need to store large quantities of data.

One goal is to estimate the resource consumption of software under development so that performance models can be used to influence the architecture of the software under development. The input parameters of performance models include workload intensity parameters, hardware and system parameters, and resource demand parameters.

computer performance

About AccessScience AccessScience provides the most accurate and trustworthy scientific information available. Simulation models are based on computer programs that emulate the behavior of a system by generating arrivals of so-called customers through a probabilistic process and by simulating their flow through the system.

For this reason, most computer system performance models are approximate models.

Evaluating a computer system

Also, if the air-missile tracking system fails to detect an enemy missile in sufficient time to launch a counterattack, the system manifests performance failure. Subscribe To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible. Simulation models are based on computer programs that emulate the behavior of a system by generating arrivals of so-called customers through a probabilistic process and by simulating their flow through the system. This requires the use of predictive performance models. First, functional failure occurs when the system fails to generate the correct results for a set of inputs. Tell a friend about us , add a link to this page, or visit the webmaster's page for free fun content. The input parameters of performance models include workload intensity parameters, hardware and system parameters, and resource demand parameters. Link to this page:. You may already have access to this content. It is then necessary to predict the performance of computer systems when they are under design and development, as well as to predict the impact of changes in configurations of existing systems. Second, performance failure occurs when the system operates correctly but fails to deliver the results in a timely fashion. Therefore, in designing a computer system it is necessary to guarantee that the end product will display neither functional nor performance failure. Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Recommend AccessScience to your librarian.

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Links to Primary Literature Additional Readings The evaluation of performance, from the perspectives of both developers and users, of complex systems of hardware and software.

There are analytic, simulation, and hybrid performance models.

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Structured evaluation of computer systems