Cash flow is where the essential properties of a business model are determined. Do the quiz and check if you understand the importance of cash flow for your business model. Understand which models are successful applied by Microsoft, Oracle, SAP, Symantic, vmware, RealDolmen, Cegeka, A.C.A. IT Solutions, Salesforce, LinkedIn, Netsuite, Constant Contact, Amazon, 99designs, Zalando, Elance, Facebook, Twitter, Zynga, Yelp, Yahoo! and Google