Dose Course 2018_Flipping book

Are existing definitions of Tolerance Level and Action Level useful ?

from the IAEA TEXTBOOK: Radiation Oncology Physics:

If a daily measurement is within the tolerance level , no action is required.

If the measured result exceeds the action level , immediate action is necessary and the machine must not be used clinically until the problem is corrected and the correction is verified by measurement. However, if the measurement falls between tolerance and action levels, this may be considered acceptable until the next measurement. If repeated measurements remain consistently between tolerance and action levels, adjustment is required.

Any measurement at any time outside the action level requires immediate investigation and, if confirmed, rectification.