Encourage responsibility and ownership
A balanced mix of experience is important within a team for development and on-the-job training. By managing the pace of work and allowing staff to take ownership of their station, the flow of your service will improve especially when staff feel more responsible about their duties. A clear vision of what work needs to be done, by when and in what time scale will reap rewards.
You should also consider providing training for staff members to help them learn useful new skills and improve already existing ones. This can do wonders for your restaurant, especially when staff members all maintain the same high standard of service.