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Value driven tolerance limits – RP162

Criteria for Acceptability of Medical Radiological Equipment used in Diagnostic Radiology, Nuclear Medicine

and Radiotherapy. RP 162 (European Commission), 2013

The suspension levels identified have varying degrees of authority and consensus attaching

to them. These are represented by g oupi g them under the headings A to D in order of

preference (Table 1-4).

Table 1-4 Types of Suspension Level

Suspension Level

Definition

Type A

This is based on an international standard or a formal

international or national regulation.

Type B

This is based on formal recommendations by scientific,

medical or professional bodies.

Type C

This is based on material published in well-established peer

reviewed scientific or medical journals and/or (exceptionally)

based on reviewed recommendations from the drafting

group. For Types A/C and B/C, see the text.

Type D

The need for a Type D suspension level arises when it has

not been possible to make recommendations for explicit

suspension levels (see text).

“Failure to meet a suspension level will establish that the operation of the equipment

involved is sufficiently poor to raise an alarm indicating action is required”

SUSPENSION LEVEL = ACTION LIMIT