I have a BOM with following 

FP 5 KG = (Row Material 1, Row Material 2)

I have a Routing has three WC (Preping, Cooking, Testing)

In Preping all raw materials will be used as per the BOM to produce 5 KG FP

In Cooking no Row Material will consume but what we get with preping Operation, will be cooked which is 5 KG.

Note: After done with Cooking we got 4KG instead of 5. (its not scrping )

So when it goes to next work center Testing, odoo takes operation of 5 QTY, But actully after cooking we have 4QTY as we loose 1kg during the cooking.

How can we fit this scenario in Odoo13 ?

Is there any app is available to fit this or any other references ?

Thank you!