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Availability, achieved (Aa) [6] The probability that an item will operate satisfactorily at a given point in time when used under stated conditions in an ideal support environment (i.e., that personnel, tools, spares, etc. are instantaneously available). It excludes logistics time and waiting or administrative downtime.
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.
[2] [3] A more narrow definition of supply chain management is the "design, planning, execution, control, and monitoring of supply chain activities with the objective of creating net value, building a competitive infrastructure, leveraging worldwide logistics, synchronising supply with demand and measuring performance globally".
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 ...
In the manufacturing environment, lead time has the same definition as that used in supply chain management, but it includes the time required to ship the parts from the supplier. Shipping time is included because the manufacturing company needs to know when the parts will be available for material requirements planning purposes. It is also ...
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]
Available-to-promise (ATP) is a business function that provides a response to customer order inquiries, based on resource availability. [1] It generates available quantities of the requested product, and delivery due dates. Therefore, ATP supports order promising and fulfillment, aiming to manage demand and match it to production plans.
Logistics is inherently difficult and complex for a global supply chain as it deals with trade regulations, shipping distances, and cross-currency issues. Companies and/or organizations who place an emphasis on logistics management can find themselves with a serious competitive advantage as it has a clear visible impact on customers.