Process Capability Studies Using One-Sided Specifications

Process capability studies calculate the process capability indices Cp and Cpk.  These statistics tell us how well the process is meeting specifications or requirements.  Capability studies are designed for two-sided specifications that have an upper and a lower limit.  Adjustments must be made when we have a one-sided specification and/or a boundary limit in place […] read more

On April 27th, 2019, posted in: Project Management by Tags: ,

With Data, Anything Can Happen!

In article 73 in this series, I discussed the issue of whether to transform data.    Students of Six Sigma often think (incorrectly) that there is something inherently wrong with their data if it is not normally distributed.  We should always strive to understand why the data is distributed the way it is and recognize that […] read more

On April 10th, 2019, posted in: Project Management by Tags: ,

PDCA Thinking and Sports Team Performance

The PDCA cycle (Plan-Do-Check-Act) is an iterative four-step approach for managing and improving products and business processes.   Today we will discuss how the PDCA approach is used by sports teams, with an eye toward how this same thinking can be applied to improving the performance of business processes and products. The Plan Phase begins with […] read more

On January 19th, 2019, posted in: Articles, Business Analysis, Project Management, Six Sigma by Tags: ,

Math Anxiety, Dyscalculia and Six Sigma

In our Black Belt program, we make extensive use of Minitab statistical software.  The software performs the actual mathematical calculations, relieving the student of the burden of knowing how to do them using paper and pencil.   To use Minitab effectively, students must be able to choose the appropriate test or analysis to perform for a […] read more