You tell Glass Expert the criteria for the glasses, like cost, weight, and bulk absorption. You can even tell Glass Expert the catalogs to choose from, and filter glasses according to refractive index and stain resistance.
Glass Expert takes it from there and, through an iterative process, automatically chooses the best set of glasses for your design that provides superior color correction. Glass Expert applies intelligent limits on glass choice. It might choose a high density, expensive or highly absorbing glass for a small, thin element, but not choose that same material for a large, thick element.
The end result will be a practical set of glasses that improves performance, reduces costs, and maintains manufacturability.