I want to say there is no solution to this. Scrapping under a WO within an MO does not trigger or communicate any demand once raw material is scrapped. To take from Rao's comment above, if you scrap 5 raw materials on an WO, no pick or demand to replace the 5 raw material components for either the WO or MO is generated or communicated. All you can do is continue to process the WO for the full required quantity, and close the MO for the full required quantity. Of course, this would not mimic actuality, as you'd be 5 finished products short. This however won't be reflected in Odoo as the scrap option on a WO is nothing more than superficial, living on its own island, not reflecting inventory or consumed quantities.

Currently I am trying to use automation to trigger a series of work arounds. But this has not proved fruitful so far and with the current build, probably not possible.

You can scrap the finished product after you have marked the MO as ​​Done

As far as I have been informed, this should be possible in V13

Hi,

If you have to scrap the final product before it is finished , you will have to scrap every component allowed for the product because production problem can come  from one component. Also if the production process is finished and you have to scrap the components , its not possible as they are not available anymore for further manufacturing.

Thanks,