Others have expressed concern that the Policy Governance model may not be as universally applicable as suggested by Carver and that the model has a tendency to break down during times of crisis. Addressing the universality concern, proponents of Policy Governance argue that, because the model is rooted in the generic purpose and nature of board authority rather than current practice of the specifics of any industry, at the level of its fundamental principles Policy Governance is indeed applicable to all governing boards. Proponents also argue that at times of crisis, holding onto the precepts of Policy Governance is in fact key to organizational survival and that rehearsing the use of the system in light of various scenarios can help build an organization's resilience to risk.