A model I greatly favor is having the architect chair the group, but having the bulk of the group drawn from the technologists of each delivery team — the leads of each team at a minimum. The architect is responsible for making sure the group works, but the group as a whole is responsible for governance. This shares the load, and ensures that there is a higher level of buy-in. It also ensures that information flows freely from the teams into the group, and as a result, the decision making is much more sensible and informed.
Architecture Governance
