It is easy for aerospace buyers, purchasing managers, and planners to succumb to the alphabet soup of acronyms and ideas used in the IUID/UID government policies. Jet City Laser answers many of the most frequently asked questions about the IUID program in this IUID guide.
The machine-readable IUID marks enable quick and precise automatic data capture for program management, engineering, and accountability.
Using IUID marks enables government agencies to distinguish one item from another throughout the usable life of the item being traced.
The program originally was called UID (Unique Identification). The UID acronym needed to be officially changed because it was so easily confused with the Government of India’s identification card program for Indian citizens, called AADHAAR ‘UID’ for Unique Identification.
Another reason to push for the change from UID to IUID existed closer to home. The armed forces and government agencies noted the similarities among UID, IUD, and IED.
The Unique Item Identifier (UII) is the set of data encoded into a Data Matrix symbol that is so unique that it identifies only this one particular item.
The UII is encoded into a Data Matrix symbol with a software program that uses a very specific language. It’s laid out with a mandated sentence structure that a computer can identify and interpret anywhere it is read.
A 2d data matrix can encode a significant amount of data and incorporate a robust Error Correction Code (ECC). A single square or rectangular 2d code can handle up to 2,335 alphanumeric characters – equivalent to two pages of typed, single-spaced text.
There are several advantages to using 2d data matrix technology versus a standard linear 1d barcode:
Digital error correction codes (ECC) are used routinely in computer-generated data activities like satellite communications, digital TV, CDs and DVDs, RFID, 2d codes, and QR codes. Digital error correction keeps your digital audio files from becoming white noise. Error-correcting codes embedded in the 2d matrix keep IUID 2d codes readable in the field year after year.
The preferred IUID symbology used for the marking on an item is a 2-dimensional (2d) data matrix symbol using Error Correction Code (ECC) 200. Error correction codes are clever human-designed digital algorithms that eliminate distortion problems with digital data and can even restore data when a part of the code is damaged or missing.
ECC 200 is one of the newest versions. It can be distinguished from older versions because it has an even number of squares (known as modules) per side.
Yes, certain IUID constructs allow 1d codes. By design, 1d linear barcodes are limited in the amount of data that can be coded within them.
They can also be used in the catch-all category called a ‘DoD recognized IUID equivalent’.
A data construct is a standardized information layout. The term comes from the phrase ‘Constructed Item Unique Identification’. The rules are laid out in MIL-STD-130 and DFARS 252.211-7003.
The Department of Defense (DoD) requires its suppliers and their subcontractors to select both a data construct and an encoding format for their UID numbering system.
The two most common types of item unique serialization construction layouts approved by the DoD are Construct #1 and Construct #2.
The UII data can be ‘constructed’ in one of many formats; the most common formats are UII Construct #1 and UII Construct #2.
The key to determining whether to use UII layout Construct 1 or Construct 2 layout lies in how a company serializes item numbers.
Based on the current enterprise configurations
The Unique Item Identifier (UII) is the set of data encoded into a data matrix symbol. The UII is so unique that it identifies only one particular item.
Every UII construct includes the following three data points:
The UII data is derived by concatenating the data elements in the following order.
UII Construct #1 Example (serialization within the enterprise identifier)
Use Construct #1 when the company providing the item serializes unique items (rather than serializing by part number, lot, or batch). Serialization is sequential and defined by the number of unique items issued or produced. This unique item identification (UII) is achieved by combining the issuing agency code, the enterprise identifier (EID), and the serial number, which must be itself be unique within the enterprise identifier.
UID GUIDE QUICK TIP
CONSTRUCT #1 FORMATS are identifiable by two separate 2d matrix codes on the nameplate.
Two UII Construct #2 Examples (serialization within the original part, lot, or batch number)
Use Construct #2 when the business or government activity that controls the production of the item uses serialization within the original part, lot, or batch number.
UID GUIDE QUICK TIP
CONSTRUCT #2 FORMATS are identifiable by one 2d Data Matrix code on the nameplate.
Jet City Laser is the go-to business for all types of IUID nameplate, label, and direct part marking services. We make sense of the alphabet soup of acronyms and ideas used in the IUID/UID government policies.
Contact us online or call 206-623-4949 today to speak with a government complianceand nameplate specialist.