McKinsey on the Helix Organization

"Separating people-leadership tasks from day-to-day business leadership can help organizations strike a better balance between centralization and decentralization, reduce complexity, and embrace agility." 

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"In a nutshell, the secret of the helix lies in disaggregating the traditional management hierarchy into two separate, parallel lines of accountability—roughly equal in power and authority, but fundamentally different.
One of the two lines helps develop people and capabilities, sets standards for how work is done, and drives functional excellence; the other focuses those people and capabilities on the priorities for the business (including overseeing their day-to-day work), creates value, and helps deliver a full and satisfying customer experience."