A private cloud uses an organization’s own hardware, provisioned with a cloud operating system so resources can be managed according to usage. It can extend the value of existing hardware investments, but the organization remains responsible for managing that hardware. section 8.3.1
Consider it when you have both substantial hardware investments and the people to manage a resource pool. Moving resources away from failing hardware can improve stability and reliability. Commercial and open-source options offer different levels of management. section 8.3.1
Ask what happens when the pool runs out of capacity. A hybrid cloud can use public-cloud resources to cover the shortfall. section 8.3.1

