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The Leadership Pipeline
Here we pull a page from Patrick M. Lencioni’s The Five Dysfunctions of a Team: A Leadership Fable, a book we recommend that all leaders peruse (it’s a quick read).
Verne Harnish • Scaling Up : How a Few Companies Make It...and Why the Rest Don't (Rockefeller Habits 2.0)

Five principles define the Leadership Pipeline model: Leadership work must be clearly defined and differentiated by layer/role.
Ram Charan, Stephen Drotter, James L. Noel, • The Leadership Pipeline

The High-Potential Leader: How to Grow Fast, Take on New Responsibilities, and Make an Impact
amazon.com