Managers use control systems to monitor performance and ensure that organizational strategies and structures are working effectively. There are three types of control - feedforward, concurrent, and feedback. Feedforward control aims to anticipate problems, concurrent control addresses issues as they arise, and feedback control examines past performance to inform future actions. Effective control involves setting standards, measuring performance, comparing results to standards, and taking corrective action when needed. Control can also happen through financial targets, direct supervision, rules and procedures, and developing an organizational culture with shared values and norms.