Case
Employee scheduling
A week's schedule that has to work on the wall and in a pocket: names, shifts, holidays, and a day you can edit on a phone.
What it is
You set the week, catch shifts that run too long or the wrong way, and walk through a day person by person. CSV in and out if the office still lives in a spreadsheet.
The boundary
This is shop software, not a model. The hard part is the day: editing on a phone, what "too long" means, and what still has to print.