Coping with complexity

We offer a new typology of problems according to such attributes as the fuzzy set of possible solutions, the fuzzy set of properties a solution should have, the fuzzy set of knowledge necessary and sufficient to find a solution, deadlines and constraints. Problems are ranked by degree of ‘structuredness’ from well-structured to ill-defined. Some real problems are shown to be ill-defined and the causes of their inherent imprecision are traced. A model for coping with ill-defined problems enables us to estimate an optimal degree of precision in both dealing with the problem and in requesting information to help cope with it. This has interesting implications for the design of information systems.