Certified Six Sigma Black Belt Exam Basic 4

Question 1

Which chart is most appropriate for monitoring the proportion of defective items in a process with variable subgroup sizes?

Accepted Answer

p-chart

Answer

The p-chart monitors the proportion of nonconforming items and accommodates variable subgroup sizes, unlike the np-chart which requires constant subgroup size.

Question 2

The concept of 'transfer function' in Six Sigma (Y = f(X)) means:

Accepted Answer

Output quality is a function of input and process variables

Answer

The transfer function Y = f(X) expresses that process outputs (Y) are determined by input variables and process factors (Xs), guiding teams to control the inputs to improve the output.

Question 3

What is the purpose of a Measurement System Analysis (MSA) before collecting process data?

Accepted Answer

To ensure the measurement system's variation is acceptable relative to total variation

Answer

MSA verifies that measurement system variation is small enough relative to process variation and tolerances so that collected data accurately reflects the true process.

Question 4

In Design of Experiments (DOE), a 'full factorial' design means:

Accepted Answer

All possible combinations of factor levels are tested

Answer

A full factorial design tests every combination of all factor levels, allowing estimation of all main effects and all interactions.

Question 5

What does 'Cpk' measure that 'Cp' does not?

Accepted Answer

The actual process centering relative to the nearest specification limit

Answer

Cpk adjusts for process centering by measuring the distance from the process mean to the nearest specification limit, penalizing off-centered processes unlike Cp.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Basic 4