How many times have you had a developer make the statement “I need a VM to test this one thing. Can I get one to user for a little while?” This generally is the concept behind VMware Lab Manager which allow you to have a VMware Lab that can be sandboxed for VMs that need connectivity for outbound traffic, in and outbound, or no traffic at all by providing a fenced network for your VMs. Best of all, it allows your developers to log in and self provision their VMs and make as many clones, or better yet, linked-clones (which dramatically reduces the disk space needed for the copied VM). Time limits can be set around the VMs that are requested in order to reduce the possibility of VM sprawl. It is a very useful tool that removes a lot of the manual intervention of a VM administrator for provisioning VMs.