Turning software into a service

The authors explore the concept of software as a serviced, which envisages a demand-led software market in which businesses assemble and provide services when needed to address a particular requirement. The SaaS vision focuses on separating the possession and ownership of software from its use. Delivering software's functionality as a set of distributed services that can be configured and bound at delivery time can overcome many current limitations constraining software use, deployment, and evolution.