Inventory Planning, why does it not count a transfer order as supply?

Selected IR on Stock Item/General Tab, no Default Warehouse.

Added two Warehouses Details - one for IR (Replenish Source = Purchase) and one for DRP (Replenish Source = Transfer; Location updated for DRP on Inventory Planning tab and for specific Location).

Inventory Planning Results by Item - still shows 0 Qty OH

Changed Stock Item/General Tab to DRP, and made sure both Warehouse Details remained as above. Regenerated, same results and Inventory Planning Results by Item still shows 0 Qty OH

Kept Stock Item/General Tab to DRP, 

Updated both Warehouses Details to DRP one for Replenish Source = Purchase and one for Replenish Source = Transfer; Both Locations updated for DRP on Inventory Planning tab and for specific Location.

Regenerated, and now shows Inventory Planning Results by Item Qty OH correctly.

However, for our Replenishment Source with Purchase we wanted to continue using IR. We like the way the Calc, Apply, Prepare Replenish works and updates the Replenishment Parameters as demand changes.

It seems DRP is all or nothing which we did not know when we began our extensive testing and wasted a lot of ours and our VARs time.

Good information.  I would plan with DRP for everything because it processes all warehouses at the same time particularly when a warehouse is replenished by transfer , handles stock and non-stock kits, generates exception messages to monitor existing supply orders, allows for forecast, uses days of supply to consolidate planned orders (think of a situation where multiple satellite warehouse are sourced from a central warehouse and you want to create one supply order for the central warehouse), and it will minimize inventory investment because planning is time phased.  You can keep using IR to calculate reorder point and safety stock., after all it’s free - but it only looks at invoices and not dependent demand.

Thank you ​@dgodsill97 - we will test ‘using IR to calculate reorder point and safety stock’ even though the Purchase Source item is set to DRP as Planning Method. We didn’t know that was an option.

Items set to DRP do not appear in the Calculate Replen Parameters screen

Well that’s just ducky!  Please enter a support case.  I don’t know what they were thinking when they decided that.  There no reason to exclude the calculate and prepare based on the inventory planning method.