In summary, the model means the concept the principles, methods and criteria of the various of systems that can adhere to guidelines in the operation to achieve the objectives.How much is the structure and relation? Depending on the root factors or rules situation variables are studied, which are designed according to the concept, theory, research, and the basic principles in the formulation. The other is main.Can be summarized as 2 steps 1) to create or develop and 2) checking the accuracy of the model.
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