Bar code conformance and performance

One thing that has been learned in the 40+ years of the implementation of applications based on bar code data capture is the need for conformance and performance standards. These are applicable whether the actual technology is a linear symbology or a 2-D symbology. In the latter case, sophisticated error correction techniques do compensate for some of the problems that are more common in linear bar code.

This category covers four types of conformance standard:

 #  There are standards that support the creation of original symbols that are then incorporated into product packaging and replicated thousands, even millions, of times. 
 # Individual symbols, whether produced singly or mass-produced, need to conform to their associated symbology specification. The "printing" processes to produce these are very broad, so there are standards that test the printed symbols. These are generally applied post-production, where the symbol is at its highest quality. Some industries use the symbol standards as a means of measuring deterioration to ensure that they are still readable in the main scanning applications. 
 #  A device, known as a verifier, is the means of testing symbols. Verifiers are built against the requirements of a particular symbology and sometimes the symbol generation process. Verifier standards provide a structured way of testing and calibrating verifiers. 
 # The most recent development in bar code conformance standards is concerned with the fact that symbols are displayed on screen, particularly mobile phones, which are then presented to scanners. These conformance standards need to take into account the symbol generation and display procedures.

 

     The category also covers standards that deal with scanner and decoder performance so that devices can be compared.