1. Studio time bills itself.
Members check in and check out on a tablet by the door. The system charges to the half hour and puts it on their account. Nobody adds up a month of sign-in sheets.
2. A six-week class is one class.
One offering, one roster, six dates. Add a student in week three and they are on the list for weeks four, five, and six. No re-copying rosters session by session.
3. Firing is billed by the cubic inch, against a real credit balance.
Work is measured by volume and drawn from credits the member already bought. A piece that cracks in the kiln is not billed. The credit goes back.