According to the present invention, the sequential work operations of each group are monitored for compliance with {HEAD ~ a sequential pattern} for the group having the same working pattern for {TAIL ~ each working cycle} 
According to the present invention , the sequential work operations of each group are monitored for compliance with { HEAD ~ a sequential pattern } for the group having the same working pattern for { TAIL ~ each working cycle }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL