Field help (SHIPSLAG)

If you have entered a transport number, the time lag date linked to the transport is automatically displayed and cannot be modified. If you need to modify this information, delete the transport number and save.

If you have not entered a transport number, you can freely enter a time lag in number of days (integers). This difference is considered when calculating the expected arrival date. This can be a delay causing the initially planned arrival date to be behind schedule.
When recording the shipment, the entered value increments the Total days difference. The time difference to be applied is reseted: you can enter a new time difference if needed.