17 Revenue Streams Revenue streams result from value propositions successfully oΩered to customers. Key Resources Key resources are the assets required to oΩer and deliver the previously described elements . . . Key Activities . . . by performing a num- ber of Key Activities. Key Partnerships Some activities are outsourced and some resources are acquired outside the enterprise. Cost Structure The business model elements result in the cost structure. r$ Kr KA KP C$ 5 6 7 8 9 bmgen_final.indd 17 6/15/10 5:31 PM