Why does Oracle do not partial reserve for FG items but does it for CTO/configuration items?

Hello All,

Lets consider the setup below:

Order line transaction type --> Shipping tab --> Scheduling level = Allow all scheduling actions.

System Parameters --> Allow Partial Reservation = Null (i.e. means do not do any partial reservation)

FG item:

Total Quantity: 10

Available to reserve: 10

1. Created Sales order for FG item.

2. Order quantity for 15.

3. Once it is booked, scheduling activity takes place.

4. Performs the reservation and finds Order quantity <> Available to reserve quantity. Therefore it doesn't reserve any item.

CTO item:

Total Quantity: 10

Available to reserve: 10

1. Created Sales order for CTO item.

2. Order quantity for 12.

3. Once it is booked, scheduling activity takes place.