21 STM3633 sem 1 24-25

Which of the following is NOT a type of variation in SPC?

• Common cause

• Assignable cause

• Random cause

• Special cause

Which chart is used to monitor the number of defects in a sample?

• p-chart

• R chart

• Scatter diagram

• X-bar chart

What is the purpose of a control chart?

• To analyze customer complaints

• To study how a process changes over time

• To visualize data distribution

• To identify root causes of problems

Characteristic of common cause variation is

• random and unpredictable.

• occurs in specific situations.

• caused by external factors.

• predictable and stable over time.

Which of the following is a basic tool of SPC?

• Pareto Chart
• Control Chart
• Histogram
• Fishbone Diagram

What is the primary function of a histogram in p chart?

• determine the sample size

• visualize the distribution data

• display the timeline

• calculate the average of data.

Which of the following tools is best for visualizing process flow?

• Flowchart

• Fishbone diagram

• Control chart

• Scatter diagram

The characteristics in X bar-R chart

• to measure customer satisfaction.

• tracks individual data points.

• not applicable for process control.

• monitor process mean and variability.

attribute data should be displayed in which control chart

• c-chart
• x-bar chart
• s-chart
• p-chart or np-chart

which control chart should be used if more than 9 subgroup is analysed?

• R-chart

• C-chart
• U-chart
• p chart