The queue has a corresponding scheduler level M, where {TAIL ~ M} is a positive integer less than or equal to {HEAD ~ N} 
The queue has a corresponding scheduler level M , where { TAIL ~ M } is a positive integer less than or equal to { HEAD ~ N }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD