The effective mirror size for a virtual telescope made up of spacecraft flying in formation depends on the separation of those spacecraft.

ECONOMIST: Birds of a feather

If we were to virtualize servers, though, the principle of separation of duties would dictate that all of the systems on a given virtual server must be of the same security sensitivity.

FORBES: Teach Your Boss To Speak Security: "Separation Of Duties"

While separation of duties does apply, the principle of economy of mechanism indicates that creating multiple virtual servers on a single host with software like VMware is creating a complex system.

FORBES: Teach Your Boss to Speak Security: Economy of Mechanism