I think the answer is kind of obvious, but disappointing: the way to scale is to both divide responsibility while simultaneously sharing it. The way to do this well is to work on the basics: communication, training, quality, study, operations, continuous improvement.

There is no magical model for this, no buzzword, no single practice, because different businesses and use cases need to be adapted to it. But there's 70+ years of study into methods to do this, and I believe they're taught by all the business schools. It's just nobody wants to do the work.

....On the other hand, nobody teaches MBAs how drastically different tech is than other industries, and thus how you run your "factory floor" has to be different. But the basic principles above should still be applied; they just have to be adapted to the industry and work. What one should not do is just accept things however that industry does it, because they probably aren't doing the above principles either.