How to Find Out the Minimum Sample Size for Lean Six Sigma

A lean six sigma initiative is only as good as the data that supports it. A minimum sample size of 30 to 50 is required for reliable results. But this depends on a number of key factors.

Applying statistical methods to measure process performance and capability can be a powerful way to drive process improvement. Six Sigma and Lean Six Sigma are two commonly used approaches that leverage statistical analysis to identify causes of process variation and defects.

When applying these methods, one crucial question that must be answered is, “What is the minimum sample size required?” The answer to this question depends upon several factors, including the desired level of precision, confidence, and accuracy. This post will explore these factors and guide how to determine the minimum sample size for your Lean Six Sigma initiative.

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