For product structures, new models or recipes can be created that you can later be used in quotations and orders. A model includes structure hierarchy, structure levels and their parts with their work phases. For structures cost price and sales price can be calculated during their creation, and these prices can be transferred to quotations and orders as they are. It is worth creating a receipt of a structure when it comes to repeated orders. There are two groups of structure groups: product structures and sets. A product structure is a hierarchy, and a set is a single-level structure in which contains part lines.