ASQ Six Sigma Green Belt 5

Question 1

Which of the following best defines 'takt time' in lean manufacturing?

Accepted Answer

The available production time divided by customer demand rate

Answer

The actual cycle time required to complete one unit

Answer

The time from order placement to order delivery

Answer

The time a product spends waiting between process steps

Question 2

When performing a regression analysis, what does the R-squared (R²) value tell you?

Accepted Answer

The proportion of variation in Y explained by the X variable(s)

Answer

The slope of the regression line

Answer

Whether the regression model is statistically significant

Answer

The number of data points needed for a valid model

Question 3

A Green Belt is analyzing defect data across five product lines using a chi-square test. What type of null hypothesis is being tested?

Accepted Answer

The defect proportions are independent of (not associated with) product line

Answer

The mean defect rates are equal across all five product lines

Answer

The standard deviations of defect counts are equal across product lines

Answer

The distribution of defects is normal for all five product lines

Question 4

What is the difference between 'precision' and 'accuracy' in a measurement system?

Accepted Answer

Precision refers to consistency of repeated measurements; accuracy refers to closeness to the true value

Answer

Accuracy refers to consistency of repeated measurements; precision refers to closeness to the true value

Answer

Precision and accuracy are interchangeable terms in measurement systems analysis

Answer

Accuracy is measured by Gage R&R while precision is measured by calibration

Question 5

In a full factorial 2^3 DOE with factors A, B, and C, how many experimental runs are required (excluding replicates)?

Accepted Answer

8

Answer

3

Answer

6

Answer

9

Question 6

Which of the following is an example of a 'poka-yoke' (mistake-proofing) device?

Accepted Answer

A USB connector that can only be inserted in one orientation

Answer

A statistical process control chart posted at the workstation

Answer

An operator checklist for part inspection

Answer

A training program for new assembly line workers

Question 7

In the DMAIC framework, which phase is responsible for quantifying the financial and operational impact of the improvement on the business?

Accepted Answer

Control

Answer

Define

Answer

Measure

Answer

Analyze