This problem because the Max  = 0 , Give the max an integer value such as 5 and purchase order line quantity will be 5

Hey Mahmoud

Thanks for replying. The issue is not related to the quantity that gets added to a PO itself, but that an item with forecasted stock "0" gets added. We don't want this item to be added.

Actually to state the problem, I'm explaining the case:

– Product X –
On Hand: 3
Forecasted: 0

– Product Y –
On Hand: 6
Forecasted: -6

Whats the correct orderpoint setting for the products, so we
1. DON'T get a PO for Product X, since forecasted is "0", which means, all open delivery orders are being fulfilled with the current stock
2. but get a PO for Product Y, since Forecasted Stock is -6, which means, we need 6x the item, to fulfill all outgoing delivery Orders

I was thinking by using the upper method with min: -1, max: 0, multiple: 1 we could solve the issue, but it hasn't worked in my staging environment.

To clarify again:

Right now we're using the Reordering Rules with Min: 0, Max: 0, Multiple: 1. What is happing now is, that in any case, when the Forecasted Stock drops to "0" the item gets added to the PO. We don't want this behaviour. We want the Reordering rule to apply when a forecasted stock drops below zero, which means, as soon as it's -1 or less. 

Does anyone have an idea?