What the board shows
The week is shown in an hourly grid. One click into an hour creates the appointment. The block shows title, time, technician, job number and vehicle. On-call duty is its own block, not a hidden calendar.
You assign a person from the team – or deliberately no one. Vehicle and tools come from your stock; the tool register knows UVV and TÜV inspections and reports what is due. Holiday and sickness lie as stripes on the day.