Is there a limit to the number of criteria that I use when creating a decision?

Our experience is that most multi-criteria decisions can be made with 4-7 criteria, however there is no limit. Here are two things to keep in mind: 1) Only include criteria that are differentiators in the decision; 2) The number of pairwise comparisons to prioritize the criteria increases as the number of criteria increases. 3 criteria require 3 pairwise comparisons; 4 criteria require 6 pairwise comparisons; 5 criteria require 10 pairwise comparisons; 6 criteria require 15 pairwise comparisons; 7 criteria require 21 pairwise comparisons.