Information technology and communication is responsible for nearly 80% of all productivity growth in the Australian services sector. A critical strategic alignment decision is the trade-off between investments in shared corporate IT infrastructure and individual business unit IT applications. The current response is to establish elaborate IT governance, reporting controls aimed at balance and compromise across the organization. Our model will provide a deeper understanding of what should be built as shared corporate IT infrastructure and as IT applications within individual strategic business units. This research will enable Australian industry to get greater value from its existing levels their expenditure in IT.