The second order costs of automation should consider time spent diagnosing and repairing said automation, and consequences of automation failure.

For example, should an automation fail, will manual processes still work? Does execution of a manual correction, or repair, require the knowledge or skills of a particular person or persons that may not be available, etc, or can it be done by the normal persons that the automation is intended to serve/benefit?

In the Smart Home context, when the automation or other cleverness fails, will ____ still be operable normally by a regular person?