I want to understand how ewm functionality of yard management to work
1. to reuse vehicles and transportation units (TUs), as many times as required or If want to make vehicles and TUs unique, use shipping and receiving activities (S&R activity).
2. Track the inventory of TU in yard.
3. Reassign the TU used for inbound delivery for outbound delivery
4. How to create more than one HU on the same level, for the system to uses the first HU to create a vehicle activity and uses the remaining HUs to create TU activities
5. How to have nested HUs, for the system to uses the highest-level HU to create a vehicle activity, and uses the lower-level HUs to create TU activities.