Many new Lean Six Sigma practitioners ask what a real project looks like in practice, especially in a healthcare setting. One of our SixSigmaStudyGuide.com students, Harpreet, recently shared a success story about improving hospital room turnaround times. Let’s take a look at her project and then explore how we might enhance it using a structured (more…)
Managing difficult stakeholders in Six Sigma projects is one of the most underappreciated yet crucial skills a practitioner can master. If you’re wondering how to handle difficult stakeholders in Lean and Six Sigma, understanding that Lean and Six Sigma are built on data, structure, and improvement is key. But there’s one wild variable that even (more…)
What do you get when a legally blind and partially deaf woman launches a nutrition company in the 1980s? You get my mom. Back then, there weren’t many women starting businesses. Especially not ones bootstrapped from kitchen tables, with no funding, no internet, and no roadmap. But she saw a problem: Kids, including / especially (more…)
Chi-Square Variance Test: The Definitive Guide for Six Sigma Practitioners The chi-square variance test is an essential statistical tool in the Six Sigma toolkit, used to test hypotheses about the variability of a process. Whether you are verifying a supplier’s claim, evaluating the impact of a process improvement, or assessing consistency, understanding how to apply (more…)
The chi-square test of independence (also called a chi-square test of association) determines whether two categorical variables are statistically independent of each other. In Six Sigma, this is extremely useful for analyzing contingency tables. For example, you might want to see if defect occurrence is independent of the shift, or if customer satisfaction ratings are (more…)