Six Sigma vs. Lean

What is the difference between Lean and Six Sigma?

Lean and Six Sigma are two different frameworks that can be used to improve the effectiveness of a given process. Lean is focused on customer value and waste reduction, while Six Sigma focuses on variation reduction and statistical analysis.


Six Sigma

Focus is on:

Waste reduction

Variation reduction

Leads to:

Cycle time reduction

Defect reduction (3.4 DPMO)

Philosophy/ approach

Five Philosophies of Lean

- Identify Value

- Map the Value Stream

- Create Flow

- Pull

- Seek Perfection

Five Steps to improve a process (DMAIC)

- Define

- Measure

- Analyze

- Improve

- Control

In summary:

Lean looks at the ways to increase the flow.

Six Sigma focuses on achieving consistency

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