what is pre-provisioning? when is it ideal?

Pre-provisioning is used in the context of on demand computing environment. For the on-demand computing requirement pre-provisioning is the viable option as it helps business meet the requirement of the dynamic data center requirements. Organizations would like to reduce the time it takes to commission servers when a new workload is to be deployed. The approach is ideal when

• The sizing and capacity planning is fully understood
• The workload is fairly constant, ensuring good utilization levels are achieved
• There are business reasons that require the physical separation of workload  
• Workload can be scaled horizontally