availability

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availability

[ə‚vāl·ə′bil·ə·dē]
(computer science)
Of data, data channels, and input-output devices in computers, the condition of being ready for use and not immediately committed to other tasks.
(navigation)
The probability that a navigational system will function and provide required levels of accuracy, integrity, and continuity.
(physics)
The difference between the enthalpy per unit mass of substance and the product of entropy per unit mass multiplied by the lowest temperature available to the substance for heat discard; used in determining the ratio of actual work performed during a process by a working substance to that which theoretically should have been performed.
(systems engineering)
The probability that a system is operating satisfactorily at any point in time, excluding times when the system is under repair.

availability

(system)
The degree to which a system suffers degradation or interruption in its service to the customer as a consequence of failures of one or more of its parts.

One of the components of RAS.

availability

The accessibility of a system resource in a timely manner; for example, the measurement of a system's uptime. Availability is one of the six fundamental components of information security (see Parkerian Hexad). See also uptime and high availability.
References in periodicals archive ?
The NAA service simplifies decision making concerning network availability by automatically auditing, analyzing, and reporting on a network's reliability and traffic congestion, including each network element and enterprise-defined service group.
Network availability problems are classified into two areas:
Unique to NetForce Ranger is its ability to analyze network availability problems from the perspective of a user on the affected network segment.
offers a full spectrum of network analysis solutions to enhance the productivity of networking professionals and to Maximize Network Availability for end user networks.
For single links the UMRS will provide improved network availability at a low overall cost, by enabling radio redundancy with a single modem.
Nevis Networks develops and markets ASIC-based LAN security appliances designed to help corporations protect information privacy and integrity, ensure network availability, and maintain regulatory compliance.
Nevis Appliance Family for the First Time Integrates All the Security Functions Necessary to Ensure Network Availability, Protect Data Integrity and Privacy, and Assure Regulatory Compliance
and Unicenter NSM improves network availability and reliability and it also extends CA's Service Availability solution, which helps assure reliable access to IT services, by increasing visibility and understanding of the impact of network changes on service delivery.

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