I have read that these parameters have little impact over the results. But I need to read more, because I have to say some words about this to my students
Here is wiki about GA parameters used in Darwin tools and related forum discussion, for your reference.
Genetic algorithm parameters in Darwin Designer
Forum discussion - Darwin Designer GA parameters
You can read more about generic algorithms in help documentation, please search for GA, in help and multiple topics will be listed there.
If you are interested to learn thoroughly about GA then we would recommend you to go through book - Advanced Water Distribution and Management , it has separate chapter on generic algorithms.
Bentley Technical Suppport
Answer Verified By: Boyan Borisov