Callahan and Soileau (2010) researched the impact of audit committee characteristics (size, number of meetings and the percentage of members who are financial experts) and IAF characteristics (organisational reporting independence and staff competence) on enterprise risk management adoption, finding evidence to support such correlations. Abbott et al. (2010) explored the relationship between audit committee involvement and the resources accorded to the IAF, via a survey targeting the CIAs of Fortune 1,000 companies. The results indicated that audit committees with greater oversight allocated more hours to the IAF than those with less. They also showed substantial variations in IAF budgets and the allocation of those budgets to particular activities, revealing that while the major slice of IAF budgets is directed to internal controls activities, a significant amount is devoted to non-controls activities.