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The termination criteria for the optimization process in terms of maximum number of iterations and optimization convergence tolerance are defined in this panel.

For topology design the minimum mass redistribution is used to stop the search when the topology has evolved sufficiently. This convergence tolerance is compared to the Mass_Redistribution history variable displayed in the view panel. The default value is 0.002.

For surface design the convergence tolerance indicates how much the surface stress was smoothed: a value of 1 indicates that a uniform surface stress was achieved, while a value of 0 indicates no improvement. The value is relative to the initial variation of the surface stress – so a value of 0.5 will indicate a 50% reduction of the initial surface stress variation.