Darren, the president of a boutique accounting firm, wants to provide his staff with the opportunity to shift from a five$-$day work week to a four$-$day work week, but he doesn$$t know how to structure the week. He wants to work with his staff to agree on a single solution. He wants the staff to be committed to these new arrangements and to be willing to implement them. What group decision$-$making technique could Darren use to develop group agreement on the solution to this problem?