Management plays the biggest role in the effectiveness of internal control. Managers should establish appropriate policies and provide assurance to ensure that the internal control system is operating effectively.
All personnel of the organization aim to fulfill certain activities while performing their duties. These activities combine with other activities of the unit to achieve unit objectives, and unit objectives lead to the achievement of organizational objectives as a whole. Employees working at all levels of the organization produce information to be used in the internal control system and engage in activities that affect controls. Therefore, all employees are a part of internal control and are responsible for its implementation.