sequence diagram showing the process of a customer booking an appointment with OA:

1. The customer accesses the OA website or calls the customer care number to book an appointment.

2. The customer selects a date and time, selects a vehicle from their profile, and provides their contact information.

3. The system confirms the appointment and sends a confirmation message to the customer.

4. The system updates the appointment calendar and adds the appointment to the list of upcoming appointments for the inspection manager.

5. On the day of the appointment, the inspection manager arrives at the OA facility and prepares to inspect the vehicle.

6. The inspection manager performs tests and checks on the vehicle, and identifies any recommended or optional tasks.

7. The inspection manager creates an observation report and sends it to the branch manager.

8. The branch manager presents the observation report to the customer and obtains approval for the recommended and optional tasks.

9. The branch manager updates the observation report with the approved tasks and sends it to the auto engineer.

10. The auto engineer receives the observation report and begins preparing to work on the vehicle.

This sequence diagram shows the steps involved in the "Book Appointment" use case, which includes the "Inspect Vehicle" use case. It also shows the interactions between the customer, the system, the inspection manager, the branch manager, and the auto engineer.

draw sequence diagram showing the process of a customer booking an appointment.