The third model was the payback, a favorite of business in the 1960’s and used at least half of the time by 74.5% of the respondents. Fourth in popularity was the discounted payback model, used at least half of the time by 56.7% of the companies. Finally, at least half time usage was reported for the last three models as follows: profitability index ranks fifth at 43.9%, followed by accounting rate of return at 33.3% and finally, modified internal rate of return (MIRR) at 21.9%. Examination of within model