The new trend in warehouse management in the world it's inventory control management system , why does the inventory get this important in warehouse management field ?

Inventory is money and obviously is should be the focus point.

Lets say you are having $10000 and you are ordering for $8000. Payment terms are 45days for your supplier, means after 45days you need to pay $8000 dollar for your supplier. If you are selling all the ordered goods, then you will be paying from the money generated, so that keeping the asset intact, but if you are not selling means you will be paying from the asset and every day of the product not sold (Inventory) will incur cost and you will be running short of cash for regular activity.

Hope you understand the shifting focus towards inventory.

I apologize for the answer I leave the answer to the specialists the experts in this the field that's not my area.