Rough consensus
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Rough consensus is a term used in consensus decision-making to indicate the "sense of the group" concerning a particular matter under consideration. It has been defined as the "dominant view" of a group as determined by its chairperson. The term was first used by the Internet Engineering Task Force (IETF) in describing its procedures for working groups. Rough consensus is consistent with other forms of consensus decision-making, such as Quaker-based consensus.
The means to establish rough consensus was described by the IETF (1998) as follows:
Working groups make decisions through a "rough consensus" process. IETF consensus does not require that all participants agree although this is, of course, preferred. In general, the dominant view of the working group shall prevail. (However, it must be noted that "dominance" is not to be determined on the basis of volume or persistence, but rather a more general sense of agreement). Consensus can be determined by a show of hands, humming, or any other means on which the WG agrees (by rough consensus, of course). Note that 51% of the working group does not qualify as "rough consensus" and 99% is better than rough. It is up to the Chair to determine if rough consensus has been reached (IETF Working Group Guidelines and Procedures).
