Circle group leader: the full responsibility for the activities of the group, including the registration of the circle group, the selection of the course, the activities of the normal organization, the submission of the report of the results of the activities, and the work of all the contact with the outside.
Circle group staff: the activity course and the activity plan of the circle, participate in the circle group activities, use the QC tool to accomplish the activities of each phase, the implementation of the measures and the validation of the effect.