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...Probabilistic engineering analysis and design professor youn byeng dong chapter surrogate modeling or response surface methodology introduction rsm is a collection of statistical mathematical techniques useful for developing improving optimizing processes the most extensive applications are in industrial world particularly situations where several input variables potentially influence some responses e g performance measure quality characteristic product process called independent they subject to control engineer scientist at least purposes test an experiment figure side shows graphically relationship between y two construct there must be systematic way gathering data space primary procedures involved with collecting information doe approximation general procedure can summarized as step choose model s considered plan experiments over perform simulation points determine confidence interval check adequacy if not adequate then go refine does all exercises variation present whether under fu...