The cost, effort, churn, verb and other task data are used to provide {HEAD ~ a real time human resources system} which provides {TAIL ~ an accurate and current analysis} of an employees job performance 
provides
The cost , effort , churn , verb and other task data are used to provide { HEAD ~ a real time human resources system } which provides { TAIL ~ an accurate and current analysis } of an employees job performance
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH