Some rights can only be abandoned unanimously. For example, in disciplinary proceedings, only one member may require that the vote on the imposition of a sanction be by ballot.  In non-legislative advisory bodies acting under Robert`s internal regulations, unanimous consent is often used to expedite the review of non-controversial applications.    Sometimes it is used as a time-saving device, especially at the end of the session. Sometimes Members do not want a formal vote on this issue or they know that they would lose such a vote and do not feel the need to take the time to do so. A meeting could be postponed unanimously. If, at the end of a meeting, no one has more to say, the Chair simply declares the meeting postponed without a formal request or formal vote.  If you have an important main query or proposal that depends a lot on the outcome, TAKE A FORMAL VOTE. Do not use unanimous approval, although it seems that everyone probably agrees. Unanimous approval can be used as part of a consensus decision. In this process, unanimous approval does not necessarily imply unanimous agreement (see consensus decision agreement against approval).
The unanimous approval process still works well. Modern governance processes make it work even better. No matter how the bodies deal with approval notices unanimously, they must always know which rules, laws and regulations must legally approve them. In Westminster parliaments, leaving the house or leaving the Senate is a concept similar to that of unanimous approval. If a member asks for leave to do something different from the rules, a single objection may prevail.   In the case of undisputed cases, unanimous action may be the most effective way to vote. No one likes to stay in a meeting longer than necessary. This is the best-kept parliamentary procedure for shortening a sitting: bypassing the debate on non-controversial motions. The Board of Directors may use the unanimous agreement for routine matters that do not require board approval or for major events discussed and agreed upon by the Board of Directors.