In the studies of requirement of amino acids the mathematical model utilized define which individuals will be achieved in the population, the mean individual (Broken Line model) or the most demanding individuals (polynomial model) (Pesti et al. 2009). However, meet the most demanding individuals cannot be the method more economical, when compared the mean of the individual broiler population to recommend the IAA (Hauschild et al. 2010). The simulation in this study was considered a normal population and this allows to simulate two or three deviations, thus, this is advantageous because it is possible develop nutritional strategies to achieve the most demanding individuals in each economic scenario and make the decision with statistical
