What is the nature of the relationship between internal audit departments in parent and subsidiaries companies ( responsibilities and duties)?

Internal Audit department liaison with the parent company and its subsidiaries. The most important role of internal audit department to help the management to identify the risk and  make risk management strategies and acts as stewardship of shareholders. Internal Audit report to Audit committee which is composite of NED's independent of company internal management which strengthens the control process of an organization. Internal Audit Department in subsidiaries company provides independent advice to parent company about the current strategical, operations or any financial issues face by the subsidiary and give recommendations and oversight the company's management performance on behalf of parent company.