Standardized Work Instructions – Implementing the Improved Process

In Six Sigma our goal is to continuously improve our ability to deliver defect free products and services that meet customer requirements.  Doing so results in higher levels of customer satisfaction and lowers the cost of operations.   In the course of a typical improvement project we define a problem, collect data about the nature […] read more

On August 22nd, 2017, posted in: Articles, Six Sigma by Tags: ,

Problems and Issues with Control Charts

Statistical process control charts, aka Shewhart control charts, are introduced in our Green Belt course.  At the Black Belt level, students are tasked to develop control charts for the primary Y variable that is to be the focus of improvement during the Define phase of their Black Belt project. Before we can rely on the […] read more

On August 11th, 2017, posted in: Articles, Six Sigma by Tags:

Transforming Non-normal Data: Proceed with Caution!

Data that follow a distribution that is either not symmetric or that is symmetric but not bell shaped are said to be non-normal.   A common misconception among students is that all data should be normally distributed, and that there is something inherently wrong if their data is not normally distributed.  In fact, data is not […] read more

On August 2nd, 2017, posted in: Articles, Six Sigma by Tags: ,

A Real World Application of Design of Experiments

Black Belt students are exposed to Design of Experiments (DOE) in their classroom training, but in my experience very few of them actually apply the technique while completing a project to earn their Black Belt certificate.  One of my students recently completed a project that made excellent use of a Designed Experiment, and his company […] read more

On July 14th, 2017, posted in: Articles, Six Sigma by Tags: , ,