The advantages of the CA approach can be studied from several different points of view, such as efficency, accuracy flexibility and ease-of-implementation. In this chapter, some computational considerations, related to the efficiency of the calculations and the accuracy of the results, are discussed. It has been noted that in general the efficiency and the accuracy are conflicting considerations, that is, better accuracy is often achieved at the expense of additional computational effort. Using the CA approach, the efficiency and the accuracy can be controlled in various ways. Sophisticated or simplified versions of the approach may be considered, depending on the problem to be solved.
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