Certified Six Sigma Black Belt Exam Lean Enterprise Concepts 4

Question 1

Which of the following is NOT one of the five principles of lean thinking as defined by Womack and Jones?

Accepted Answer

Eliminate defects at the source

Answer

The five lean principles are: identify value, map the value stream, create flow, establish pull, and pursue perfection—defect elimination at source is a lean tool, not one of the five principles.

Question 2

A team performing a rapid improvement event (kaizen blitz) wants to reduce changeover time on a machine. Which lean tool is most directly applicable?

Accepted Answer

Single-minute exchange of die (SMED)

Answer

SMED is the lean methodology specifically designed to reduce setup and changeover time by converting internal setup steps to external steps.

Question 3

In SMED methodology, 'internal' setup activities are best described as:

Accepted Answer

Tasks that can only be performed while the machine is stopped

Answer

Internal setup activities require the machine to be stopped, so converting them to external activities (done while running) is the primary SMED improvement strategy.

Question 4

The concept of 'one-piece flow' (single-piece flow) directly addresses which lean waste?

Accepted Answer

Excess inventory and waiting between process steps

Answer

One-piece flow eliminates WIP inventory batches and the waiting associated with batch-and-queue processing, exposing quality problems immediately.

Question 5

A poka-yoke device that stops a process when an error is detected is classified as a:

Accepted Answer

Control (shutdown) poka-yoke

Answer

A control (or shutdown) poka-yoke automatically stops the process when a defect or error condition is detected, preventing defective output.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Lean Enterprise Concepts 4