The graph displays the delivery time for each delivery service
On the graph, it is relatively clear how many days it took the courier to deliver the package from the shipping date. This enables the tracking of delivery success/quality and setting delivery time.
If using the checkbox: Display except weekends, when counting days from shipping until delivery, weekends are not considered
Example 1: package sent on Friday and delivered on Monday. 1 delivery day
Example 2: package sent on Friday, delivery on Saturday. 1 delivery day
Example 3: package sent on Friday, delivery on Sunday. 1 delivery day