The design of business models is greatly facilitated and enhanced through computer assistance. My dutch colleague, Professor Jaap Gordijn, provides such a tool that easily allows the design of a network of companies. The tool makes it possible to design and evaluate the profitability of a constellation of companies that want to offer value to the market together. It allows, for instance the design of such network companies as Dell, eBay or Cisco. Try it out, it's worth it.
Business Model Design with the e3value tool developed at the Free University, Amsterdam.