Question 1

Six Sigma requires an in-depth and comprehensive understanding of the behavior of a work process.

Accepted Answer

Six sigma requires a comprehensive understanding of the behavior of a process and a performance management mindset. Behavior refers to the variability of the data, and the relationships between inputs and outputs.

Question 2

Central elements of the Lean process are reducing the supplies used in a process and the costs of those supplies.

Accepted Answer

Central to lean processes are the concepts of speed and reducing cycle times.

Question 3

Although Lean and Six Sigma are different from each other, combining their use in process improvement can be useful.

Accepted Answer

The Six Sigma methodology is organized around DMAIC (define, measure, analyze, improve, control) which is linear and structured. Lean uses more of a PDSA (plan, do, study, act) approach which is somewhat less linear. Lean has a greater focus on reducing root causes of errors and waste. Some organizations have created a combined "Lean Six Sigma" to utilize the best of both methodologies.

Question 4

Statistical analysis is more likely to be used in Six Sigma.

Accepted Answer

Six Sigma uses analytical and statistical tools to examine and control variability. Statistical process control and run charts to statistically describe normal versus out of control processes, to produce results that are statistically less variable (more consistent). Lean uses more graphical presentations, including value stream mapping and Kanban.

Question 5

Lean has a primary focus in evaluating process to identify waste and also to note value-added activities.

Accepted Answer

Lean methodology emphasizes identifying and eliminating waste while enhancing value-added activities to improve efficiency and effectiveness in processes.

Question 6

Lean uses tools like the cause and effect diagram or the fishbone diagram to evaluate process activities.

Accepted Answer

Lean methodology utilizes tools such as the cause and effect diagram, also known as the fishbone diagram, to identify and analyze the root causes of issues within process activities.

Question 7

Six Sigma uses which of the following metrics?

Accepted Answer

The acronym is DPMO - Defects per million opportunities

Question 8

Which of the following describes the Six Sigma methodology?

Accepted Answer

The acronym is DMAIC, but it means Define, measure, analyze, improve, control

Question 9

Which of the following defines the goal of Lean?

Accepted Answer

The goal of Lean is to improve efficiency by removing non-value-added activities, thereby streamlining processes and reducing waste.

Question 10

Which of the following are common elements in both Lean and Kaizen?

Accepted Answer

Reduce variation is a common element in both Lean and Kaizen.

Question 11

What rate of defects in a process equates to Six Sigma?

Accepted Answer

Six Sigma equates to 3.4 defects per million opportunities, representing a high level of quality and process efficiency.

Question 12

Which of the following is a way of displaying the distribution of data through five key numbers (the minimum, maximum, upper and lower quartiles, and median)?

Accepted Answer

A box plot is a graphical representation that displays the distribution of data through five key numbers: minimum, lower quartile, median, upper quartile, and maximum.

Question 13

List and explain the four components of a process model.

Accepted Answer

The answer of List and explain the four components of...

Question 14

Describe Value Mapping and its use in Lean.

Accepted Answer

The answer of Describe Value Mapping and its use in...

Question 15

What is the Process Capability Index, how is it calculated, and is it used in Six Sigma or Lean?

Accepted Answer

The answer of What is the Process Capability Index, how...

Quiz 7: Six Sigma and Lean Management