If {HEAD ~ a fault} occurs within {TAIL ~ the software process} 141 during the first time interval, the first recovery function will be performed by the fault detection and recovery subsystem 110 
If { HEAD ~ a fault } occurs within { TAIL ~ the software process } 141 during the first time interval , the first recovery function will be performed by the fault detection and recovery subsystem 110
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH