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Preventive Controls are always preferred over detective controls as they deter the occurrence of event causing adverse impact to the company while detective controls only detect error after happening of the incidence. So preventive controls are always suggested and mostly have much cost than detective controls. But before going for preventive controls , cost benefit analysis must be done.
Both types of controls are essential to an effective internal control system. From a quality standpoint, preventive controls are more effective because they are proactive and emphasize quality. However, detective controls play a critical role by providing evidence that the preventive controls are functioning as intended.Preventive Controls are designed to discourage errors or irregularities from occurring. They are proactive controls that help to ensure departmental objectives are being met. Examples of preventive controls are:
Detective Controls are designed to find errors or irregularities after they have occurred. Examples of detective controls are: