A system for enhancing patient compliance with a predetermined breathing pattern during inspiration measurements utilizes patient feedback based on inspiration flow. A task associated with the code is identified as a potential source of performance problem for the program. A controller effects control for carrying unprocessed and processed samples among the given cassette, the waiting cassette and the vacuum processing chamber, so that a mixture of both processed and unprocessed samples does not exist in the given cassette or the waiting cassette. If the wireless communication device can receive the wireless communication service over either one of the frequency band classes, then the system selects one of the frequency band classes based on the first and second communication loads.