comparing alternatives by the ROR method (correctly performed) always leads to the same selection as PW and AW analyses, whether the ROR is determined using a PW-based or an AW-based relation. However, for the AW-based technique, there are two equivalent ways to perform the evaluation: (1) using the incremental cash fl ows over the LCM of alternative lives, just as for the PW-based relation (Section 8.4), or (2) fi nding the AW for each alternative’s actual cash fl ows and setting the difference of the two equal to zero to fi nd the i * value. There is no difference between the two approaches if the alternative lives are equal. Both methods are summarized here.