The shortage status calculation can take the actual inventory into account or also the expected future supplies.
This is what happens in the video
This means when you run the report or you define the setup, just a second, on the shortage status, there is a checkmark called include expected supply.
If you don’t checkmark this one, only the existing inventory will be taking into account. So if you use it as a tool to calculate what you ship tomorrow, you shouldn’t include expected supply, but if you use it as a tool to figure out in the future which orders has conflicts, you could include expected supplies. Be aware though when you use both the use due dates and expected supply functionality.
The same item could be on stock on one order but in conflict stock or partial delivery on other orders because there is a date difference.