Product hierarchy

Hi,

I'm looking for a solution to define a product hierarchy in a proper way with 4 layers, like: 

Material tier (gold)

Edition (std)

Product 1

Product 2

Product 3

I know there is a product catalog withing CRM 2015 but how can I add more items to a family product?

Hope that anyone can support me.

Best regards,

Nanda Spekschoor