Fuzzy granulation of interval numbers

Investigation on fuzzy granulation method for interval numbers is of great importance. This paper aims to propose some methods of granulating interval numbers. Although there exit a few methods, some of them still have imperfections in granulating process or granulation results. In this paper, after re-examining and improving these exiting methods, we propose a new granulation method based on total order of interval numbers. Experiments and comparisons are given based on the constructing data and the real-life data. The granulation results show that the methods proposed in this paper are applicable.