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Availability, inherent (A i) [5] The probability that an item will operate satisfactorily at a given point in time when used under stated conditions in an ideal support environment. It excludes logistics time, waiting or administrative downtime, and preventive maintenance downtime.
Common metrics include availability, reliability, maintainability, supportability and total cost of ownership. The primary means of accomplishing this are through incentivized, long-term contracts with specific and measurable levels of operational performance defined by the customer and agreed on by contracting parties.
Minimum required availability of complex system is a key factor of many distributed and repairable systems like ATM network or Airliner. In Availability-based Contracts, [2] instead of parts, the supplier is paid for a guaranteed level of services, performance, and system capability, similar to availability-based tariffs for electric power. [3]
In engineering, reliability, availability, maintainability and safety (RAMS) [1] [2] is used to characterize a product or system: Reliability: Ability to perform a specific function and may be given as design reliability or operational reliability; Availability: Ability to keep a functioning state in the given environment
Contract management or contract administration is the management of contracts made with customers, vendors, partners, or employees.Contract management includes negotiating the terms and conditions in contracts and ensuring compliance with the terms and conditions, as well as documenting and agreeing on any changes or amendments that may arise during its implementation or execution.
Availability includes non-operational periods associated with reliability, maintenance, and logistics. This is measured in terms of nines. Five-9's (99.999%) means less than 5 minutes when the system is not operating correctly over the span of one year. Availability is only meaningful for supportable systems.
Operational availability is a management concept that evaluates the following. [1] Diagnostic down time; Criticality; Fault isolation down time; Logistics delay down time; Corrective maintenance down time; Any failed item that is not corrected will induce operational failure. is used to evaluate that risk. Operational failure is unacceptable in ...
A service-level agreement is an agreement between two or more parties, where one is the customer and the others are service providers. This can be a legally binding formal or an informal "contract" (for example, internal department relationships). The agreement may involve separate organizations or different teams within one organization.