Hello Paulina,
When you run MRP with Scheduling 2 (Lead Time Scheduling and Capacity Planning), the production dates will be determined using your routing. When you run the MRP with scheduling 1 (Determination of Basic Dates for Planned Orders) the dates will be determined based on the In-house production time setup in the material..
The costing run will consider the rounting. The in-house production is only relevant for the planned orders:
The system requires the in-house production time to determine the planned dates for planned orders in materials
planning.
Kind regards,
Mariano