...the maximum benefits of the cloud once they can control their workloads more effectively and turn IT resources off out of hours. Once that is possible, that is when usage-based computing will really take off," says Leonard.
He posits a number of potential types of usage-based models, including paying for each individual user per month or purchasing smaller chunks of IT capacity. Service-level agreements, suggests Leonard, will need to develop around such usage-based characteristics, giving CIOs the opportunities to buy performance on demand.
Tip 5. On-demand as true agility
Sanjay Mirchandani, CIO at EMC, also recognises that the cloud has to change and become more agile. He says IT as a service requires an integrated cloud architecture, with service-based pricing.
"The business should pay for the level of service it expects. If the business pays for platinum quality, the CIO should ensure the business gets platinum service. That represents a true transformation to service-based IT, where agility is inbuilt and not simply bolted on," says Mirchandani.
"Strip away the black box surrounding IT and think about how you can deliver technology as a service to the business. Think carefully about how you relate with your colleagues and you will begin to see how agility can really happen."
Tip 6. Cloud for mobile workers
Bill Chang, executive vice president of the business group at SingTel, is impressed at how rapidly business models for the cloud are taking shape. He says early adopters are making quick on-demand gains and expects mobile to be the next frontier for cloud.
"More and more people now own tablet devices and are requiring access to cloud-based apps on the go. That trend is creating new challenges in security, control and performance," says Chang.
"Managing the cost of deployment is a major challenge for CIOs, but we're seeing that some organisations are well-positioned. The early adopters are starting to move forwards with regards to cloud computing and mobile devices."
Tip 7. Towards the native cloud
The third stage of the cloud, suggests Colt's Leonard, will revolve around a native-like form of computing. Here, applications will be written to meet business rules that closely match the capabilities of on-demand technology.
Rather than infrastructure or apps being simply hosted in the cloud, software will be specifically designed to take advantage of on-demand capabilities. Such features will specify how apps run at certain times and whether they should automatically burst their capacity at peak times, regardless of cost.
This native form of software development will mean CIOs can cost-effectively provide apps that are ready for any business eventuality. "CIOs will see a stage where developers write an application with inbuilt levels of availability and disaster recovery," says Leonard.
Mark Samuels is a business journalist and editor at IT leadership organisation CIO Connect. He has written for various organisations, including the Economist Intelligence Unit, Guardian Government Computing and Times Higher Education.