A process control chart would be effective in displaying which condition?

A process control chart would be effective in displaying which condition?

• A. Out of control processes
• B. Prediction of future demand
• C. Economic costs
• D. Employee productivity

Answer: (A)

Process control charts are used to watch how a process behaves over time and to distinguish normal, random variation from special causes. They’re most valuable for signaling when the process is out of statistical control—shown by points outside the control limits or nonrandom patterns in the data. That out-of-control signal tells you an assignable cause may be affecting the process and action is needed to bring it back into control. Forecasting future demand, calculating economic costs, or measuring productivity require other tools, not SPC charts.

Process control charts are used to watch how a process behaves over time and to distinguish normal, random variation from special causes. They’re most valuable for signaling when the process is out of statistical control—shown by points outside the control limits or nonrandom patterns in the data. That out-of-control signal tells you an assignable cause may be affecting the process and action is needed to bring it back into control. Forecasting future demand, calculating economic costs, or measuring productivity require other tools, not SPC charts.