Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Measure Phase Tools 1

Question 1

A process capability index (Cpk) is used in the Measure phase to determine which of the following?

Accepted Answer

How well a process fits within customer specification limits, accounting for process centering

Answer

Cpk measures how centered and capable a process is relative to its specification limits. A Cpk of 1.0 or higher generally indicates the process is capable of meeting customer requirements, making it a key output of the Measure phase.

Question 2

Which Measure phase tool plots individual data points in time order to reveal trends, shifts, or cycles in process performance?

Accepted Answer

Run chart

Answer

A run chart displays data sequentially over time, making it easy to spot non-random patterns such as trends or shifts before adding statistical control limits. It is a foundational tool for understanding process behavior across time.

Question 3

In the Measure phase, what does the width of bars in a histogram primarily communicate?

Accepted Answer

The spread and distribution of variation within the process

Answer

A histogram displays the frequency distribution of data, revealing the shape, center, and spread (variation) of a process. Understanding this distribution helps the team establish a baseline and identify whether the process is normal or skewed.

Question 4

What is the primary purpose of establishing a 'baseline' measurement during the Measure phase?

Accepted Answer

To document the current process performance before any changes are made

Answer

A baseline captures the current, pre-improvement state of the process using objective data. It is essential because it provides the 'before' benchmark against which the success of improvements in later phases (Improve and Control) will be measured.

Question 5

Which of the following best describes 'continuous data' as used in the Measure phase?

Accepted Answer

Data that can take any value within a range, such as temperature, weight, or cycle time

Answer

Continuous data can assume any numeric value within a range and is measured rather than counted. It typically provides more statistical information per data point than discrete (attribute) data, making it preferred for capability and variation analysis.

Lean Six Sigma Yellow Belt Certification Practice Test

Lean Six Sigma Yellow Belt Certification Practice Test

Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Measure Phase Tools 1