Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Certification 1

Question 1

Which tool is commonly used to visually display the frequency distribution of defects or problems in a process?

Accepted Answer

Histogram

Answer

A histogram displays the frequency distribution of data, making it easy to see the shape, spread, and center of a dataset — useful for understanding process variation.

Question 2

In Lean Six Sigma, what does the term 'Kaizen' refer to?

Accepted Answer

A philosophy of continuous incremental improvement

Answer

Kaizen is a Japanese philosophy meaning 'change for the better,' focused on making small, continuous improvements involving all employees rather than large one-time overhauls.

Question 3

Which of the following best describes a 'process capability index' (Cp)?

Accepted Answer

A ratio comparing process spread to specification limits

Answer

The Cp index measures how well a process fits within its specification limits by comparing the specification width to the process spread (6 sigma), indicating whether the process is capable of meeting requirements.

Question 4

What is the primary goal of the 'Control' phase in DMAIC?

Accepted Answer

Sustain gains and prevent the process from reverting to old behavior

Answer

The Control phase ensures that improvements made during the project are maintained long-term through control plans, monitoring systems, and standardized procedures to prevent backsliding.

Question 5

Which Lean waste category describes producing more output than what is currently needed by the customer?

Accepted Answer

Overproduction

Answer

Overproduction is considered the most serious of the eight Lean wastes because it generates inventory, consumes resources, and can mask other process problems.

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 Certification 1