About Checking the Quality of the Optimization Result

To get an impression of the quality of the optimization, it is necessary to check the values of the constraints and the objective at the end of the optimization.

If SIMULIA Tosca Structure stops, the problem has converged or the maximum number of iterations (by default 50) is reached. If no convergence is achieved, it can be possible that the constraints are too strict meaning that they cannot be reached because of the mechanical boundary conditions of the model. The model plot does not give any information about the quality of the result.

A converged model shows the following characteristics:

  • The change of the objective function is very small so that the plot of the value of the objective shows a nearly horizontal line.
  • All the constraints are fulfilled or inactive (fulfilled but not near to the constraints value).
  • The changes of the constraint are very small so that the plot of the constraint value shows a nearly horizontal line.