Use committees to be more efficient.
Some items of business are not only too complex and time-consuming for the Board, and are also too much for an individual. The answer is to establish a committee to explore the matter and bring a proposal to the Board. Committees only advise the board and give recommendations. They cannot actually make decisions, because Board decisions must be made by the Board.
The Board decides what the committee will do, selects its members, and appoints a chairperson. The Board might also invite outside experts.
The Board also decides how long it will exist. Some are temporary, and some are permanent. Finance is most likely to be permanent if the organization's finances are complex or otherwise difficult to manage.
If the relationships in the committee are good, this is the most efficient way to tackle difficult issues. However, Board members can feel that decisions are already set up
in a way that the Board loses its power to make decisions. Avoid letting individual board members stack the subcommittee to favor their own preferred decisions.