The method creates a sequence of runs of insulating glass units to be produced for assembly to window or door sash and {TAIL ~ frames} at a plurality of {HEAD ~ glazing lines} 
The method creates a sequence of runs of insulating glass units to be produced for assembly to window or door sash and { TAIL ~ frames } at a plurality of { HEAD ~ glazing lines }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD