We've all been to the dentist or have received some form of medical service in our lives. Would you say that any one of these steps from scheduling the appointment, receiving the services, or paying for the services requires more attention than the others? In your own words explain the difference between pre-service, point-of-service, and after-service activities. What elements would you say are central to each? How could an organization create a competitive advantage in each of those three areas?