A user-specified value, typically identified as a date or serial number(s), which denotes the applicability of a specific condition on an item or document. Examples are:

• The effectivity date of a document or item, i.e. when it is suitable for use
• The applicability of a waiver or deviation
• The implementation of a modification on a selected serialized item

See also DEVIATION, DOCUMENT APPROVAL, ITEM APPROVAL, MODIFICATION, SERIALIZED ITEM, and WAIVER.