I am going to implement an ERP software to a manufacturing company.
The problam I have is described bellow taking an example.

this company produces a product called A and it going through 4
machineries to become a finished produict(all the raw materials are
weighted itemsliek powders and up to machine 3 it comes as a weighted
product, machine 4 convetr this powder to solid product which
can be measured by no. of pieces.). so we can define the BOM,
routing etc, accordingly.

But let say after going through first 3 machines the product get rejected
becouse of poor quality. but they do not scrap the product,
they keep this rejected batch aside and once u get a batch of
same product with good quality they add some amount of the rejected
batch and continue this till they get rid of all rejected lot.

so how can I work this out in a ERP system?