Description: time-related proportion within a given period during which an object was able to perform when required; Name: Time-related availability
Description: During a given period of time, percentage of the time during which an item was able to perform when required ; Name: Time based availability
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