I'm not with IKEA but I've been part of other ontology exercises. Off the top of my head, they are a retailer with physical stores and distribution centers--which could both be categories within the concept "location". They have associates (people), and customers (maybe just "people" again, but maybe a different concept.) I could also imagine transactions or loyalty accounts as other concepts. Depending on how far they go, they could include things like "region" (i.e., region-> has many -> location) or general ledger accounts.