A working group is a defined set of people, usually coming from multiple teams or disciplines to fix a common business challenge.
Review the goal at the beginning of every meeting to remind group members of what they’re trying to achieve. Since the problems you’re tackling can be broad and fuzzy, having an explicit goal can also help you decide what is and isn’t the responsibility of the group.
Here are some questions to fill in to see how your solutions fit into your wider goal (check out how Etsy used this method to define "design excellence" for their team)
“In order to be effective, the group has to ship; in order to ship, milestones should be established from the beginning.” Without delivery dates in place, it is impossible to create an action plan that accurately reflects the speed in which you must be working to achieve your goals.
Working groups should have regularly scheduled meetings or collaborative work sessions to check in on progress, answer questions, and plan for future work. Meeting regularly helps to remind group members of this work and give everyone face time with one another. If there is any urgency to the work or a lot of smaller pieces to keep track of, it might even be helpful to add a weekly standup for status check-ins.