You can create a logical grouping of one or more product records using Product Group. This construct allows you to create combinations of products with similar characteristics/qualities for use in a Price Rule. Product Group (as opposed to Product Family) can consist of products from different product families.
In order to configure a product group, you must create a product group and add products as members of the group. You can add products as members of a group. You can also add products of different product families as a member of a product group.