In principle, groups often get bogged down in details (who should do what by when and how) and fail to stay on the high ground (strategic direction and guiding policies).
The group as a whole has the unique perspective of seeing all that the group is doing, all the opportunities, all the threats. It is a view from the hill top. An individual group member has the unique perspective of seeing the details on the ground and has the best sense of how to actually implement policies in the field.
Practical Tip: As a group responsible for establishing plans and policies, consider the big picture and make high-level decisions that guide implementation. Resist the temptation to dictate details. Encourage the group as a whole to stay on the high ground and trust individuals to handle the trenches.