Concept
Accountability Chart
3 books in the library reach for this idea - each in its own way. When independent authors converge on one concept, it usually deserves attention.
Get a Grip
How this book uses it: Not an org chart - defines who owns what function, with clear accountability for results.
Rocket Fuel
How this book uses it: EOS tool defining who owns what function, distinct from traditional org charts.
Traction
How this book uses it: Org chart defining roles by function, not people. Clarify who owns what in your team.