Demarchy

The system of Demarchy, described in this link, "is based on a network of numerous decision making groups. Each group deals with a specific function (i.e. transport, land use, parks) in a given area – so it’s not a “generalist” system. The membership of each group is chosen randomly each year from all those who nominate they are interested in working on that topic."
Interactive Democracy encompasses a flavour of this system, in that it enables citizens to contribute to policies, by instigating them, debating them and voting on them. Those citizens with an interest in a certain area of policy will more likely contribute. But instead of randomly selecting just some citizens from a pool of those that have declared themselves interested, ID involves all of them in a structured form of debate.