Pairwise Ranking: A Six-Step Approach to Evaluating Alternatives

In the Improve phase of a Six Sigma project, we typically need to choose between two or more potential solutions to a problem.  There are several tools to help in making this decision, one of which is pairwise ranking.   Pairwise ranking is used by individuals or teams to qualitatively prioritize a list of alternatives.  There […] read more

Are we solving the right problem?

Students in our Green Belt course analyze and comment on a case study that deals with products that are returned by customers.  They are challenged to discuss what was done well in the case and what could have been done better. The products being returned for credit are data storage systems that are suspected of […] read more

Don’t like the data? Throw it out!

One of the first tasks our Black Belt students are asked to do when completing a project is collect data over time and create control charts for the primary output metric.  The purpose of these control charts is to establish baseline performance, and to determine if the process is stable. One of my students is […] read more

Economic Impact and Project Selection

Our Six Sigma Green Belt course includes a lesson on project selection.  Students are tasked to identify three or more potential improvement projects and make estimates of the cost to plan and execute the projects in dollars as well as the economic impact of completing the projects in dollars.   They then must explain which project […] read more