Control involves monitoring activities to ensure goals are met and correcting deviations. There are three approaches to control systems: market, bureaucratic, and clan. The control process involves measuring performance, comparing to standards, and taking action on deviations. Effective control is accurate, timely, flexible, and emphasizes exceptions. Contingency factors like organization size affect control design. Controls can become dysfunctional if unfocused, incomplete, or inflexible. Quality, inventory, financial, and human resource controls are used.