@Lyman & others
Forget to put human left, and machine right : they are both together in the effective aircraft. We do not manage a pile of plates, plate human, plate machine, separatly. Otherwise you will always have an interface problem.
Observability and controllability are minimum required.
I learned that when learning first year automation in Paris. They concern the total dynamic system.
Describing human as a system or a part of the system is not a negation of menkind... !
