Hi ks629, I think you make a valid point but I see why using a different coating from the same supplier may be beneficial. Since the contract is already signed with that specific supplier, it’s easier to change product selection within the company itself rather than seeking a new supplier. Now, it depends on why the primary source failed to be delivered on time. If the reason is something that has affected the entire supplier facility, such as an earthquake, it does not make sense to use a different coating from the same company. If the reason is just that a sub-supplier hasn’t delivered their part on time or in good condition, then it makes sense to use a different coating from the same supplier that is readily available for procurement. It may be worth having a totally different backup supplier, even though it’s more paperwork, in the case that the first supplier cannot meet requirements sufficiently.