A working group can delve into a problem that requires skills distributed between members and structure. Its usefulness depends on the task assigned. Without a perimeter, meetings can multiply and leave it unclear which outcome will need to be delivered and to whom.
I propose to describe the initial question, the available information and the expected product. Reconnaissance of needs is different from the preparation of a proposal. The decision-making powers remain those provided for by the cooperative; the group should know the limit of its assignment.
Let's imagine a group studying delivery times. It could pick up criticalities and compare few alternatives, keeping their assessment distinct from final adoption. The participation of the interested members helps when it brings usable information and real conditions of local work.
At the conclusion it is necessary to make recognizable what has been learned and what elements are missing. If the task changes, it needs to be redefined. A temporary group performs a useful function when its work enters the decision-making path and there remains no series of meetings without follow-up.