Which type of control tool identifies whether or not a process has a predictable performance?

Question

Options

• ACause and effect diagram
• BControl Charts
• CPareto Chart
• DHistogram

• A
  6% (4)
• B
  79% (52)
• C
  5% (3)
• D
  11% (7)

Explanation

Control Charts are specifically designed to monitor process performance over time and determine whether a process is operating within statistical control - meaning it behaves predictably. Cause-and-effect diagrams (A) identify root causes of problems, not process stability. Pareto Charts (C) rank defects or issues by frequency to prioritize improvement efforts. Histograms (D) show the distribution of data at a single point in time but don't reveal whether the process is stable across time.

Memory tip: Think "Control Chart = Control over time." The word control in the name is the clue - it's the only tool that tells you if your process is in control (predictable) or out of control (unpredictable) by plotting data points against upper and lower control limits.

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