Another systemic barrier is "knowledge hoarding", present in many large consulting firms. In this case, it has taken individuals a long time to achieve expert/partner status, so the incentive to share this knowledge is not given. There are few other dynamics that come to mind that could help remove barriers and break the dam: moving from push to pull (don't wait for finalized orders), from stocks to flows (don't wait for finalized deliverables), from narrow to broad (don't wait for finalized messages). But, as you said, it's for leadership to make that call.