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Message:: [QUOTE="Inspector43, post: 3810549, member: 89213"]Every manufacturing process has variations. In every process there are several different acceptance criteria: Design Acceptance Criteria, Manufacturing Acceptance Criteria, Customer Acceptance criteria and Management Acceptance Criteria. These criteria addresses Fit, Form and Function - everyone must recognize it as a US Dime; it must fit in other devices designed for dimes; it is manufactured within the costs assigned by management; the finished product represents the desires of the producing authority (it looks good). It doesn't take much from this process to release something that fits all these criteria until you get to the Customer Acceptance Criteria. In the case of the collectors (customers), we have determined what the criteria is as related to errors. We define errors as we see fit. The US Mint cannot produce 10 coins out of a production run that look exactly like the design drawing. Therefore, the process variances will typically be represented by a normal curve and most will be within given tolerances. Otherwise every coin would have some degree of "error". The issue now is what deviation should be given enough weight to be referred to as an "error"? That can get very busy if we don't put some additional controls on it. So, you cannot say everything outside of design is an error if it can be shown that it is within the Design Acceptance Criteria.[/QUOTE]