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