While many promising new technologies vie for the attention of IT leaders and CIOs, only a few of these innovations actually end up improving top-line performance or bottom-line productivity. Our recent survey of senior US IT executives1 and our experience with clients suggest that companies view two new technologies as highly promising tools for obtaining real business benefits: server virtualization (which helps companies improve the match between their computing capacity and their application workloads, so that they can do more with fewer machines) and software as a service (which allows IT departments to offload the delivery and maintenance of software applications). Companies clearly view these technologies as priorities that promise to help them become more efficient and agile.
Virtualization is a software technology that helps raise the utilization rates of servers. It allows companies to run several different operating systems—UNIX, Linux, and Windows, for example, as well as the applications that run on top of them—on a single machine. Distributed servers running a single operating system typically utilize only about 5 to 15 percent of their full processing capacity. Virtualization can make it possible for companies to boost their average server utilization rates to 40 percent or higher while...