Lean Six Sigma Black Belt Certification Assessment 2

Question 1

Which measurement system analysis (MSA) statistic indicates the proportion of total variation attributable to the measurement system itself?

Accepted Answer

%Contribution

Answer

%Contribution from MSA (Gage R&R) shows what fraction of total observed variation is due to the measurement system rather than part-to-part variation.

Question 2

A Black Belt performs a Gage R&R study and finds the Number of Distinct Categories (ndc) is 2. What does this indicate?

Accepted Answer

The gage can only distinguish good parts from bad parts

Answer

An ndc of 1 or 2 means the gage can barely distinguish two categories (pass/fail), making it inadequate for process monitoring; ndc ≥ 5 is generally required.

Question 3

In a process capability study, a Cpk of 0.85 with a Cp of 1.40 tells the Black Belt what about the process?

Accepted Answer

The process is capable but significantly off-center

Answer

Cp measures potential capability (spread vs. spec width) while Cpk measures actual capability; a high Cp with low Cpk indicates good spread but poor centering.

Question 4

Which type of data collection plan element ensures that samples are collected at the correct time intervals to capture process variation?

Accepted Answer

Sampling strategy

Answer

The sampling strategy specifies when, how often, and how many units to sample to representatively capture the process variation of interest.

Question 5

A team uses a Kano model during assessment. Which category describes features customers do not explicitly request but whose absence causes dissatisfaction?

Accepted Answer

Basic needs (Must-be)

Answer

Basic needs (Must-be or threshold attributes) are expected by customers and their absence causes strong dissatisfaction, but their presence does not increase satisfaction.

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification Assessment 2