The method includes the stage of producing data characterizing {HEAD ~ the defects} of appliances of {TAIL ~ the appliance chain} 
The method includes the stage of producing data characterizing { HEAD ~ the defects } of appliances of { TAIL ~ the appliance chain }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL