A status of the runs, {HEAD ~ a status} of one or more insulating glass component processing machines, and a queue of insulating glass units to be assembled to window or door sash and frames at the glazing lines is monitored at {TAIL ~ a production control workstation} 
A status of the runs , { HEAD ~ a status } of one or more insulating glass component processing machines , and a queue of insulating glass units to be assembled to window or door sash and frames at the glazing lines is monitored at { TAIL ~ a production control workstation }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL