Statistical Process Control: Process Variations

Describe how plotted values on control charts can be interpreted. Describe common patterns of instability and identify conditions that can cause these patterns to occur. Describe how an operator can use SPC to recognize and respond to problems in a process. Define CUSUM and explain how it can be used. Describe how using CUSUM compares to using control charts. Describe two common causes of an off-aim condition. Describe how to reset CUSUM and how to set a new aim. Define the terms defect and defective product. Describe how to use C charts U Charts NP charts and P charts.