Process control charts are used mainly to:

Process control charts are used mainly to:

• A. Portray process status
• B. Identify root causes
• C. Predict future demand
• D. Optimize product design

Answer: (A)

Process control charts are about watching how a process behaves over time and showing its current status and stability. They plot measurements with a center line and control limits so you can see at a glance whether the process is in control (variation due to common causes, stable and predictable) or out of control (a signal that an assignable cause may be disturbing the process). This focus on status—whether the process is performing as expected or needs attention—is what makes control charts best described as tools to portray process status. They aren’t primarily used to identify root causes directly, forecast future demand, or design product improvements. Those tasks involve root-cause analysis after an out-of-control signal, forecasting methods, or design optimization, respectively.

Process control charts are about watching how a process behaves over time and showing its current status and stability. They plot measurements with a center line and control limits so you can see at a glance whether the process is in control (variation due to common causes, stable and predictable) or out of control (a signal that an assignable cause may be disturbing the process). This focus on status—whether the process is performing as expected or needs attention—is what makes control charts best described as tools to portray process status. They aren’t primarily used to identify root causes directly, forecast future demand, or design product improvements. Those tasks involve root-cause analysis after an out-of-control signal, forecasting methods, or design optimization, respectively.