Yeah that's true. In ASM you have different values for stock (real_quantitiy, physical_quantity and usable quantity). We also never get complete orders. In ASM supply orders you can add part deliveries. I really don't remember, what works out of the box and what did I implement for us. But stock management is so critical for us, that I invest a lot of time in it. Next project is, to use barcode scanner and change to chaotic storage system.