Configurations to make:

• Purchase, Inventory & MRP needed
• Multi-steps routes & multi locations
• On Secondary Warehouse, select Resupply from Main Warehouse + Manufacture to resupply.

• On the route automatically created "Secondary Warehouse: Supply Product from Main Warehouse"
• • Modify the supply method on the Stock to Inter-warehouse transit rule in "Take from Stock, if unavailable, trigger another rule"

• • Create a new rule "Buy from Main Warehouse"

• Make sure the route is selectable on product and that the sequence is respected like this: 

• Create a BoM as follow:
• • Finished product with route Manufacture
  • Components with route "Resupply from Main warehouse" & Vendor pricelist populated

Process:

1. Create a MO for the finished product and update the Operation type in the Miscellaneous tab -> choose Secondary Warehouse: Manufacturing operation type

2. Confirm the MO and go in the Replenishment menu to order your components:

1. • NB: If you already have the components in the Main warehouse, it won't create any RfQ. Otherwise, it will create new RfQ.
   • A Delivery is generated from MWH/Stock to inter-warehouse transit location and a Receipt is created in SWH/Stock
2. Process the operation types
3. 1. Receive components in Main warehouse
   2. Deliver components to inter-warehouse transit location
   3. Receive components in Secondary warehouse
   4. Manufacture your finished product with the components available at secondary warehouse.

-> Video of the process here 

NB: If you have many secondary locations, inter-warehouse location is aggregating the quantities to deliver but is still reserving the adequate quantity for the appropriate destination warehouse.