An MRB disposition where the non-conformant article is determine acceptable for use even though it is not in compliance with the identifying drawing. This disposition literally appends the NC number to the P/N, such that the article is uniquely identified. During rate production, this disposition can be horrendously expensive, because none of the support documentation applies (the dispositioned item carries a unique part number). The unique part number must typically be tracked until it is retired from field use.