AAOM Handbook

The Criticality Rating (CR) is calculated based on the formula; CR = Sum of Consequences × Probability of Failure During Functional Life × Probability of Exposure.

Design Specifications

The range of values for process parameters that are nominated as acceptable for the safe and effective operation of the process, eg temperature, chemical concentration, load etc.

Detectable Threat Onset

The situation where the existence of a developing Threat can be determined from a detectable characteristic – eg measurement of wear, vibration, temperature, change of performance etc.

Equipment/Workplace

An element of a Productive Unit: • that can transform, transfer or store a product or service on its own, and • that performs a distinct function (eg each truck within a fleet; the feed chute, crusher and discharge feeder within a crushing system; each draw point within a mining stope etc), and • for which work packages are likely to be independent of the work packages for other elements of the Productive Unit, and • for which a service strategy is developed.

Fulfilment Lead Time

The minimum length of time between when the need for a resource can be identified and when that need must be fulfilled if unacceptable losses are to be avoided.

Functional Life

The period for which the function of a Process, Productive Unit or Facility will be required. The Functional life may be different to the Production Life for a process that the Facility/component is part of. For example a tailings dam will have a functional life that will extend for many years beyond the time at which disposal into the dam ends (the Production Life).

Function of an asset

A statement, that should contain a verb, object and a desired standard of performance? For example, to pump water from tank ‘A’ to tank ‘B’ at a rate no less than ‘X’ litres per hour.

© McAlear Management Consultants 2004

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