The key elements of a control system include a detailed plan, reporting system, analysis and review of reported data, and procedures for corrective action. A formal management review is a critical part of the supervision process and control system. It involves planned investigations into a program's performance and should occur at natural milestones. The review demonstrates performance, identifies training needs, and finds areas for special study to improve future implementation. Taking proper corrective action in response to reviews and analysis is important for a manager and program's success.