Vendor availability
From Protemos Wiki
If a vendor is assigned to other jobs with cross dates, the system will warn you about that when you press the "Start job" button.
The system will display the chart and list of vendor jobs with cross dates:
Here you can confirm the assignment by pressing the "Conform start job" button.
You can also change the deadline for this job or reassign it to another vendor by pressing the "Change vendor or dates" button.