I think it's acceptable to accidentally pick a bad supplier but when they learned of this three years ago they should've immediately cut ties. Oh, it's super e

I think it's acceptable to accidentally pick a bad supplier but when they learned of this three years ago they should've immediately cut ties. Oh, it's super expensive to change suppliers but own the mistake and pay the short term costs of being forced to rework supply lines while recognizing that inefficiency as the cost of skimping on your research on the supplier. I would be absolutely unsurprised if someone instrumental in setting up this partnership still got a bonus after this was discovered due to the low cost of producing the part.