Many times, we encountered challenge of number of testing products is more than number of products that can be tested by consumers in a study. For example, if we want to test 8 ice creams in a day, and definitely consumers cannot eat all 8 ice creams, thus it requires us to select 2-3 ice creams from 8 for each consumer to test, which urge us to come out with a smart BIBD. Instead of manually do it, it would be even better XLSTAT can have this function.