This strategy instructs the platform to continue solving for variable(s) in the iterative method, being primed at the onset of each generation with the central point located from the prior generation, continuing until all variable(s) in the statistical model are solved for (if possible). This is the standard default solution as the iterative method is typically a wonderful refinement tool, chewing up and spreading errors in the data along the way.
See the Knowledgebase article Solution Strategies for more detail.