Almost everything we sell consists of ready-made individual parts that we buy in, upgraded with parts we produce ourselves (3D printed parts) and the working time spent on them.

I have now entered all the parts and configured them with their value and quantity in a warehouse.

I compile the finished products as composite items and add up our expenditure - whereby the hourly rate is also configured as an item. 

I am now wondering how I can group the goods to simplify working with the finished products.

When I want to offer or sell something, I only want to see the finished products.

I was already thinking of creating different warehouses for purchases, in-house production and finished products. But that feels like superfluous work. I would prefer product groups, but the item groups seem to be intended for other functions.

How do you do that?