Population Simplex Evolution is chosen as optimization method.
The parameters for optimisation can either be left as default values or user-specified. In this case Population size is set to 8, No of points in simplex is set to 2, maximum No of model evaluations is reduced to 80 (default is 500), number of loops of convergence is set to 5 and minimum relative change is set to 0.001.
Normally ending the optimisation by meeting the convergence criteria should be preferred. Convergence criteria are a measure of the relative change in best objective function value in the last number of loops of convergence where the number of loops of convergence is also user-specified.