Value assigned to a basic variable associated with a prescribed probability of not being violated by unfavourable values during some reference period. NOTE The characteristic value is the main representative value. In some design situations, a variable can have two characteristic values, an upper and a lower value. [ISO 19900:2002, 2.7].
Source: API RP 2MOP, Marine Operations, Upstream Segment, First Edition, July 2010. Global Standards
Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards
Value assigned to a basic variable, an action or a resistance from which the design value can be found by the application of a partial factor.
NOTE 1 The value usually has a prescribed probability of not being violated which, in the case of an action, will normally relate to a reference period.
NOTE 2 Adapted from ISO 19900:2002, definition 2.7.
Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards
The representative value associated with a prescribed probability of not being unfavourably exceeded during the applicable reference period.
Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards