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The new process is based mainly on the electric heating of the dry substances as well as on the subsequent separate homogenizing and cooling in an intensive mixer and a mixing cooler . " The city told families last year that they had exhausted all available DNA technology and were putting the project on pause until new processes were developed . Attempts to build , field , and evolve COTS-based systems through the use of traditional engineering and management processes continue to be disappointing ; different skills , changed roles and responsibilities , and new processes are required . At the time of our review , it was too soon to determine whether the new process was judged by law enforcement officials in the district to be an improvement in the U.S. Attorneys ' Office operating procedures .