Separation of concerns also applies to organizations. You may see huge companies, but where business areas, divisions, product lines etc. work in isolation just

Separation of concerns also applies to organizations. You may see huge companies, but where business areas, divisions, product lines etc. work in isolation just fine. At the strategic level, things are steered like a mix of governmental and portfolio management, effectively abstracting the differences between the lower layers away. To study single-mission mega projects, the classics are the Manhattan Project, the Apollo missions and the first ICBM systems. The management of these projects were awe inspiring.