Multicameralism is the condition in which a legislature is divided into more than two deliberative assemblies, which are commonly called "chambers" or "houses". This usually includes tricameralism with three chambers, but can also describe a system with any amount more. (Wikipedia)
Mangrove and Gyroscope have been experimenting with this multi-stakeholder governance model.
https://forum.mangrove.exchange/t/mip-1-ratifying-mangrove-dao-s-governance-model-v0/61
Here is a summary of their model.
PS: I had previously posted these illustations here