IUID Items
- EID of the activity that has assigned the serial number for UII Constructs #1 or #2.
- Serial number for UII Constructs #1 or #2.
- Current PIN, lot, or batch number of the item. If this changes, the new PIN, lot, or batch number may be encoded in a single Data Matrix symbol along with the UII data.
- The original PIN, batch, or lot number is used for IUID items that are serialized within a PIN.
- When using Construct #1, the Original Part Number may be used if both the current PIN and original PIN are the same.
- When using Construct #2, the original PIN, lot, or batch number must remain clearly identified and encoded in the MRI. If this number is changed by anyone other than the original manufacturer or supplier, the new PIN, lot, or batch number must also remain clearly identified.
In addition to the standard information contained within an MRI, duplicate items are sometimes assigned a UII (Unique Item Identifier). The UII is a numbered prefix given to items in the event of duplicate part number assignments on behalf of an enterprise so that each individual part can be easily identified.
Of course, there are exceptions to the MRI marking routine as well. COTS (Commercial Off The Shelf) items that are clearly marked with some sort of commercial identification (firm name, logo, trademark, part number, etc.) and are not subject to IUID marking may be exempt from additional marking requirements, as long as the item presents no identification difficulty. Furthermore, parts within an assembly or subassembly that are not expected to be removed, repaired, or replaced are exempt from MRI marking unless it is otherwise stated in the contract.
Legacy items sometimes need to be marked, as well. If it is determined that a legacy machine needs to be marked, the EID used to generate a UII must be of the organization ensuring uniqueness rather than any previous marks.
Read more about this topic: MIL STD 130
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