This activity is similar to the activity Make Manual Reservations, with the difference that reservations for this activity are made against the supply site in an internal order flow.
Basically, whenever you sell inventory parts that have been purchased from internal suppliers (the other site in the application), you are able to reserve the parts on the supply site before the customer order on demand site is released.
You can use this procedure whenever you want to reserve order lines that otherwise would be stopped because the customer has exceeded his or her credit limit. You can also use the procedure when you want to reserve WDR and expired parts.
There are three valid choices when performing supply chain reservations on
a customer order line:
Manual Reservation: You manually allocate
how many parts are going to be reserved. You can also choose the inventory location
from which the parts will be picked. Since manual reservation is done online,
you can ensure that the parts are available and reserved immediately. You cannot
reserve more parts than stated in the order line. Reservations may be changed
until the corresponding internal customer order has been created.
Automatic Reservation: The system selects the locations from which the
part should be reserved. If defined on the inventory part, an ATP check is performed
on the supply site. Partial reservations will be handled according to the back
order option selected for the customer or customer order.
Instant Reservation: An automatic reservation on the supply site is performed as soon as the customer order line is saved.
After the supply site reservation is performed, you can always un-reserve or change the reservation using the manual supply site reservation.
You can perform all these actions on inventory parts. It can also be performed on component lines for a package part.