What is the Difference Between Six Sigma and Lean Six Sigma?

The main difference between Six Sigma and Lean Six Sigma lies in their focus and approach to reducing waste and improving efficiency in business processes. Both methodologies aim to eliminate waste and create the most efficient system possible, but they take different approaches to achieve this goal.

Six Sigma:

Focuses on reducing defects and improving process efficiency through data-driven problem-solving.
Originally designed for use in manufacturing but can be applied throughout all business processes.
Involves every tier of an organization and helps guide new processes and drive resource allocation.
Uses the DMAIC methodology (Define, Measure, Analyze, Improve, Control) for problem-solving.

Lean:

Encompasses every aspect of a business and is not solely focused on manufacturing.
Aims to eliminate waste and streamline processes to increase efficiency and improve customer value.
Identifies the root cause of waste and focuses on eliminating it.

Lean Six Sigma:

Combines the principles of Six Sigma with Lean manufacturing.
Results in a robust set of tools for effectively reducing waste.
Incorporates the problem-solving approach of Six Sigma with a focus on continuous improvement.

Choosing between Six Sigma and Lean Six Sigma depends on the specific needs and goals of an organization. Six Sigma is well-suited for organizations looking to improve the quality of their products or services, while Lean is more focused on reducing waste and improving customer value. Lean Six Sigma combines the strengths of both methodologies to achieve a comprehensive approach to process improvement and waste reduction.