NIST SP 500-304 June 2015 The existence of biometric standards alone is not enough to demonstrate that products meet the technical requirements specified in the standards. Conformance testing captures the technical description of a specification and measures whether an implementation faithfully implements the specification. Conformance testing provides developers, users, and purchasers with increased levels of confidence in product quality and increases the probability of successful interoperability. Lack of conformance to the required standard(s) can, in many cases, jeopardize the expected biometric recognition performance or prevent access to the data (as well as impact the overall operational performance) since implementers may handle non-conformant records in different ways during processing. Although no conformance test can be comprehensive enough to test all the different combinations of mandatory requirements of a standard and all possible combinations of conditional and optional characteristics that could be included in American National Standards Institute (ANSI)/NIST-ITL 2011 2013 (AN-2013) transactions, a well-designed conformance test tool that faithfully implements a standard conformance testing methodology could raise the level of confidence on the test results. Therefore, transactions tested with such a tool (and reported to be conformant to the standard), are more likely to conform to the standard.