Internal auditing evaluates the efficiency of the processes regarding risk management, supervision, management, and selected functions, and makes proposals for their improvement. Internal audit acts under the supervision of the Audit Committee and CEO. The responsible person for audit is a director appointed by the CEO and the expertise of bodies external to the auditing unit is used as needed. In addition, internal auditing may carry out special tasks assigned by the Audit Committee. Internal auditing covers all the organisational levels. The external auditor participates in the choosing of the priorities of internal auditing and the assessment of results.