With Petkafy you can create a Bill of Paterial (BOM, product tree) as deep as you like for any of your parts and you have it well visualized on all levels from bottom to top or from top to bottom.

But in addition to visualization, you can also see all relevant data for all ingoing parts of your finished product, making it easy to check your production data for all components, find causes of excessive cost and to calculate both product cost price and your preferred sales price.