How can you define the relationship between business roles and business catalogs?

A business role is assigned to a business user to provide access to business tasks. A business role can contain one or more business catalogs, which are predefined by SAP and contain the actual authorizations that allow users to access the apps contained in the catalog. Each business catalog bundles authorizations for a specific business area. You can tailor the access according to the needs of the business and for compliance purposes using restrictions. References = Finding the Required Business Roles and Business Catalogs for a Solution Process, Defining Business Roles for Production, Business Roles and Catalogs