So the discussion about Altman Z score for manufacturing versus other types of companies was mentioned. I noticed that the Altman Z Score coefficients I learned in Financial Analysis Class are different from those used by GuruFocus, those used by readyratios.com, and those used by the blogger here named AtulSave. Why don't we have generally accepted Altman Z-score coefficients for specific industries? Or is one of the reasons why some people call Z-score irrelevant is that you can get the answers you want if you just change the coefficients?...Which defeats the purpose of an objective comparison tool.