Lean Six Sigma Green Belt Certification Knowledge 3

Question 1

A Green Belt calculates a process sigma level of 4.5. Approximately what is the defects per million opportunities (DPMO)?

Accepted Answer

233 DPMO

Answer

A process at 4.5 sigma corresponds to approximately 233 DPMO, well below the 6-sigma target of 3.4 DPMO.

Question 2

Which tool is used to prioritize potential failure modes by evaluating severity, occurrence, and detectability?

Accepted Answer

FMEA

Answer

Failure Mode and Effects Analysis (FMEA) uses a Risk Priority Number (RPN = Severity × Occurrence × Detection) to rank and prioritize risks.

Question 3

In a value stream map, what does a 'push' arrow symbol indicate?

Accepted Answer

Material pushed to the next step regardless of need

Answer

A push arrow shows that material is moved to the next process based on a schedule or batch, not on actual downstream demand.

Question 4

The Kano model classifies customer requirements into three main categories. Which category represents features customers expect as basic, causing dissatisfaction if absent?

Accepted Answer

Basic needs (Must-be)

Answer

Basic (Must-be) needs are taken for granted; their absence causes strong dissatisfaction, but their presence does not increase satisfaction.

Question 5

What does the term 'takt time' represent in Lean manufacturing?

Accepted Answer

The rate of customer demand expressed as available time divided by demand

Answer

Takt time = available production time ÷ customer demand rate, setting the pace production must match to meet demand without overproduction.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Knowledge 3