Certified Six Sigma Black Belt Exam Trivia 3

Question 1

Which company is most often credited with pioneering the modern Six Sigma methodology in the 1980s?

Accepted Answer

Motorola

Answer

Motorola developed and pioneered Six Sigma in the mid-1980s, winning the Malcolm Baldrige National Quality Award in 1988 partly due to Six Sigma efforts.

Question 2

What statistical distribution is assumed when using a standard control chart for individual measurements (I-MR chart)?

Accepted Answer

Normal distribution

Answer

I-MR charts assume that individual measurements are approximately normally distributed for the control limits to be statistically valid.

Question 3

The concept of 'Jidoka' in lean manufacturing means:

Accepted Answer

Automation with human intelligence to stop at abnormalities

Answer

Jidoka, a pillar of the Toyota Production System, means automation with human intelligence — machines detect abnormalities and stop automatically to prevent defect propagation.

Question 4

Which Six Sigma tool is best suited for identifying the root cause of a problem by asking 'Why?' repeatedly?

Accepted Answer

5 Whys

Answer

The 5 Whys technique iteratively asks 'Why?' five times (or more) to drill down from a symptom to its true root cause.

Question 5

In hypothesis testing, a Type II error occurs when:

Accepted Answer

A false null hypothesis is not rejected

Answer

A Type II error (beta error) occurs when the null hypothesis is false but we fail to reject it — we miss a real effect.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Trivia 3