An ill-structured problem is "one for which various strategies for providing a possible solution rest on assumptions that are in sharp conflict with one another" Mitroff, I. I., and J. R. Emshoff.
An ill-structured problem is "one for which various strategies for providing a possible solution rest on assumptions that are in sharp conflict with one another". Four stages in the method include Mitroff, I. I., and J. R. Emshoff.