Multiattribute decision-making: use of scoring methods to compare the performance of laying hen fed with different level of yeast

A wide variety of comparative performance reports from use of different levels of dietary supplements in animal production can be helpful to decision makers. However, with the complexity and amount of information in these reports, decision making as to which dietary level of supplement is to be used is difficult. This problem is overcome only when all data can be put into a common unit. For this purpose, the present study examined our previously reported data on the effects of different levels of dietary Saccharomyces cerevisiae on performance and egg quality traits of laying hens. In this survey, five different scoring methods of maximin, equally likely, weighted average, ordered weighted averages and technique for order preference by similarity to ideal solution (TOPSIS) were used to choose the best level (0, 0.25, 0.5, 0.75 and 1 g kg-1 diet) of dietary Saccharomyces cerevisiae. The methods of equally likely, weighted average, and ordered weighted averages showed the best result at 1 g kg-1 diet of the dietary supplement but maximin and TOPSIS showed only 0.5 and 0.75 of dietary level, respectively. Overall, birds fed diet containing 0.75-1 g yeast per kg diet had better performance as compared to other groups.