What difficulties do dentists encounter when scheduling appointments?

[Eugene]

When I went for a dentist check up in NYC, they checked me, put some teeth on the to-watch list and scheduled next check up exactly 6 months after the current date. Is it common practice and does it lead to any problems, for instance does it happen that too many people who require a lot of drilling work happen to be scheduled in a row. Do dentists have any other scheduling-related issues (perhaps problems with inventory, etc). I am curious to learn about it to see if I can perhaps develop some tools to help address such problems; I could try to even out the schedule for instance or predict inventory needs.