Optional.  Utility Library Module.  This is an add-on module containing various utilities in data analysis and management throughout the pattern conversion process.
Simulation Rules Checker (SRC). The SRC Utility examines simulator output and rapidly checks its suitability for test development according to a set of rules specified by the design or product team who's familiar with the device under test.
Tester Rules Checker (TRC). The TRC utility determines whether a TDS WDB (cyclized database) complies with a set of tester-specific timing and shape requirements.
DC Search. The DC Search Utility examines a TDS SEF database (from VCD/EVCD) and searches for the best times at which to apply DC parametrics tests.
Search. The Search Utility is used to ensure that a test program exercises all of a device's pins, in all important combinations, using as few vectors as possible.
Histogram. The Histogram Utility accumulates information about signals contained in a TDS SEF database (from VCD/EVCD) and generates a report of that signal information in a tabular format.