According to the standards and practices of internal auditing, the internal audit function is primarily responsible for providing an independent and objective assurance and consulting service aimed at adding value and improving an organization's operations. If internal auditors were tasked with developing controls in business procedures, it could compromise their objectivity. Objectivity is crucial as it allows auditors to carry out audits impartially and without bias. Involvement in control creation could lead internal auditors to later audit their own work, which is a conflict of interest and undermines the principle of independence and objectivity as set by the Institute of Internal Auditors (IIA).References: The Institute of Internal Auditors (IIA) - International Standards for the Professional Practice of Internal Auditing