How Lean and Six Sigma Work Together

While both Lean and Six Sigma aim to reduce waste, they are distinct methodologies. Six Sigma focuses on reducing defects by limiting variation within a process, while Lean removes unnecessary steps for a more efficient process. Combining these two methodologies can improve business performance by emphasizing both quality improvement and profitability. Learn more about Lean Six Sigma by reading Everything You Need to Know About Lean Six Sigma.

The acronym “DMAIC” represents a key aspect of Lean Six Sigma. DMAIC stands for the five phases of an improvement cycle: Define, Measure, Analyze, Improve, Control. You can use these steps as a roadmap for resolving issues with a Six Sigma approach:

Define the project goals or problem to be addressed, internal and external customer requirements, and project boundaries.
Measure the current performance of the process and describe the process in quantifiable terms.
Analyze the process and identify the root causes of defects and sources of variation.
Improve performance by resolving the root causes of issues and eliminating defects.
Control future process performance by maintaining improvements.

Another version of this process is DMADV (Define, Measure, Analyze, Design, and Verify). The DMADV framework is typically applied to new products or services, rather than improving an existing process, or when an existing process has been improved but is not meeting a Six Sigma level. The process is similar to DMAIC but focuses on product or process design and how to implement that design effectively.