In my past experience, whenever our group assigned a corrective action to a manager, we made sure that manager's manager was on board with the assignment. Usually, we did not assign a corrective action to a manager per se, but managers were assigned to deal with the problem as the "responsible manager", if it was in their organization. Yes, we helped develop corrective actions with the manager (sometimes, less desirably, "for" the manager) but overall that manager was responsible. There was a review board to review certain corrective action completions, and could theoretically hold the responsible manager "responsible" if the action and/or how it was implemented was insufficient.