Description: ratio of the number of failures of a given category to a given unit of measure; Name: failure ratio
Description: Number of failures within a population divided by the number of life units used by that population; Name: failure rate
Description: The norm in fixed relation to the feature being described. This defines the parameters that influence the contents of the correlated feature. Type and number of the norm with issue year and issue month must be given, e.g. DIN ISO 4711:YYYY-MM.; Name: Reference norm of the coating, room1