SPC Fundamentals

Question 1

What is the main purpose of Statistical Process Control (SPC)?

Accepted Answer

Monitor and control process variation

Answer

Maximize machine downtime

Answer

Eliminate all variability

Answer

Reduce headcount

Question 2

What does a control chart indicate in SPC?

Accepted Answer

Process stability and variation

Answer

Equipment maintenance needs

Answer

Workforce productivity

Answer

Customer preferences

Question 3

What is the term for variation caused by unpredictable events in a process?

Accepted Answer

Special cause variation

Answer

Common cause variation

Answer

Machine drift

Answer

Tool wear

Question 4

Which chart type is used for attribute data in SPC?

Accepted Answer

P-chart

Answer

X-bar chart

Answer

R-chart

Answer

Histogram

Question 5

What does it mean if all points fall within control limits on a control chart?

Accepted Answer

Process is stable and in control

Answer

Process is out of control

Answer

Operator error present

Answer

Equipment needs repair

Question 6

Which SPC tool visually displays the frequency of data values?

Accepted Answer

Histogram

Answer

Scatter plot

Answer

Pareto chart

Answer

Run chart