Hello msarachaga@nsb.com.mx,

  It sounds like the issue stems from the configuration of your product routes and warehouse locations. Here's a step-by-step approach to troubleshoot and resolve the issue:

  First, ensure your product is correctly configured to use the MTO route along with the necessary manufacturing and delivery routes. This setup is crucial for Odoo to understand the flow from procurement to delivery.

  Next, verify the configuration of your warehouse and specifically the routes involved in the 2-step delivery process. The source location for the final delivery step should indeed be the "Finished Product Room". If it's not working, there might be a misconfiguration in the route or the warehouse setup.

  Lastly, check if there are any overriding rules at the product category level or specific product level that might be causing Odoo to default to the "Raw Material Room". Sometimes, specific rules set at the product level can override general warehouse configuration.

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A couple of reasons this might not work.

1. On the 3 step manufacturing, Post production to stock move is achieved with a push rule. The products in this location would always be reserved by the operation, hence will never be available for picking to Output

2. The replenishment (MTO) is likely configured for Stock location and not at the post production location.

If you wish to always pick from Post production the suggestion would be

a. Set to 2 step manufacturing

b. Add a manufacturing route to Post production location.

ie when product is required in customer location, pick from Post production and push to output; if unavailable trigger a manufacturing operation

Updated

Raw material room has a pull rule to replenish from Stock location (part of multi step manufacturing route) which probably explains why there isn’t a replenishment error while creating the SO