Rational Subgrouping of Data for Control Charts

Control charts are a tool to evaluate the performance of a process over time.   Think of the process as a river that is flowing past the point where we will collect data.  We must decide what to measure, how to measure, where to measure and how often to collect data from the process.   The story […] read more

On March 6th, 2018, posted in: Articles, Six Sigma by Tags: ,

SWOT Analysis

One of the tools that may be used to define the current state of a process is SWOT analysis.  Our Black Belt students are required to perform a SWOT analysis as part of their Black Belt project. SWOT is an acronym that stands for Strengths, Weaknesses, Opportunities and Threats.  Strengths and weaknesses are internal to […] read more

On February 16th, 2018, posted in: Articles, Six Sigma by Tags: ,

Taguchi Methods for Robust Design and the P-Diagram

In previous articles in this series I introduced Designed Experiments (Article 28) and Taguchi Methods (Article 32).   In this article I will introduce the Parameter Diagram, aka P-diagram, and explain how the P-diagram is used in conjunction with Designed Experiments as part of the robust design process. The P-diagram is used to classify all of […] read more

On December 15th, 2017, posted in: Articles, Six Sigma by Tags: , , ,

What Is The Perfect Process and How Is It Achieved?

In an earlier article entitled Zero Defects – Realistic Goal or Dream?  I stated that achieving zero defects is not a dream at all but rather a realistic goal to be pursued.   In our Black Belt course, our students are challenged to complete an improvement project where they create an improved process that is […] read more

On October 7th, 2017, posted in: Articles, Six Sigma by Tags: , ,