Given {HEAD ~ the volume} of the calculations involved in determining the aggregated impairment information, a fast method for performing the impairment evaluation and {TAIL ~ accumulation} would be useful 
Given { HEAD ~ the volume } of the calculations involved in determining the aggregated impairment information , a fast method for performing the impairment evaluation and { TAIL ~ accumulation } would be useful
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 TAIL TAIL TAIL TAIL TAIL OTH OTH OTH