Search results
Results From The WOW.Com Content Network
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.
Operational availability is used to evaluate the following performance characteristic. For a system that is expected to be available constantly, the below operational availability figures translate to the system being unavailable for approximately the following lengths of time (when all outages during a year are added together):
The Average Service Availability Index (ASAI) [1] [2] is a reliability index commonly used by electric power utilities.ASAI is calculated as = where is the number of customers and is the annual outage time (in hours) for location .
Service Level Indicator (SLI): measures of service level, like availability (uptime); Service Level Objective (SLO): objectives based on these indicators, like 99.95% availability; Service Level Agreement (SLA): contract based on these objectives; a sample clause may be "if availability is 99% to 99.95% in a given month, the customer gets 10% ...
High availability is a property of network resilience, the ability to "provide and maintain an acceptable level of service in the face of faults and challenges to normal operation." [3] Threats and challenges for services can range from simple misconfiguration over large scale natural disasters to targeted attacks. [4]
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]
The serviceable available market or served addressable market is more clearly defined as that market opportunity that exists within a firm's existing core competencies and/or past performance. The biggest consideration when calculating SAM is that a firm most likely can only service markets that are core or directly adjacent to its current ...
Reliability engineering is a sub-discipline of systems engineering that emphasizes the ability of equipment to function without failure. Reliability is defined as the probability that a product, system, or service will perform its intended function adequately for a specified period of time, OR will operate in a defined environment without failure. [1]