In my experience, when working on an integration team, the overall integration leader acts as more of a coordinator for the integration team, by bringing them together to have discussions, the functions then develop their plans, and then the functional leaders report out. I think the autonomy was very good, but some functions did not bring their “A” players to the integration, so the final plan was lacking.
In regard to integrating functions, do your organizations provide the guiderails of the integration and then let the SME’s go to work in developing the plans with regular check-ins, or does your organization provide close guidance in regard to planning?