Maintenance Concept

definition of the maintenance echelons, indenture levels, maintenance levels, maintenance support, and

their interrelationships

Note 1 to entry: The maintenance concept provides the basis for maintenance planning, determining supportability

requirements and developing logistic support.

Note 2 to entry: A maintenance echelon is a position in an organization where specified levels of maintenance are

to be carried out (e.g. field, repair shop, manufacturer facility).

[SOURCE: IEC 60050‑191]

Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards

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