1, Chapter 2: we introduce the development of incertitude theory.

2, Process Entropy is a measurement for the incertitude degree of process.

3, The evidence theory and fuzzy integral can abate the incertitude and improve the accuracy of decision.

4, Rough Set is a new mathematics theory that can deal with incertitude and incompletion data.

5, There are many new trends in economic development with the incertitude growing .