How will clients know how much time to book for an appointment.
Answer:
Clients do not control the time duration of an appointment. You control the time parameter of each service from within your control center.
All the client has to do is click an open time slot. That one click sets their arrival time, the date and the service space (or service person).
Error checking is the software routine that runs behind the scenes when someone attempts to book an appointment.
If the routine detects a time conflict then the user is asked to select a different start time or date. If there are no time conflicts the system proceeds and confirms the booking.