To me, what you're looking for doesn't exist. Ignoring Scrum, the question is "how do we know our engineers are effective?"
You know Scrum's attempt to answer that. Regardless, no matter what methodology you pick - it's bad. But, you have to answer it. Otherwise engineering is a black box without a way to peer in.
I know many engineers would prefer it that way, but that's just not realistic.
In the end the whole thing has to be an agreement between people.
To me, what you're looking for doesn't exist. Ignoring Scrum, the question is "how do we know our engineers are effective?"
You know Scrum's attempt to answer that. Regardless, no matter what methodology you pick - it's bad. But, you have to answer it. Otherwise engineering is a black box without a way to peer in.
I know many engineers would prefer it that way, but that's just not realistic.
In the end the whole thing has to be an agreement between people.