Well, you could use this as an example of error proofing if you specified the equipment with certain features that would eliminate the errors you are talking about. An auditor might challenge your position if the features are standard for the equipment, or if the features were not specified on the request for quote, the purchase order, IQ, OQ, or any other internal document related to the selection of the equipment. In other words, "prove to me that you had this error proofing in mind when you selected this equipment in particular".