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Coefficient of Variation as a Response: Not Always

The coefficient of variation (CoV) is defined as the ratio of the standard deviation to the mean. It measures the extent of variability in relation to the mean and has been recommended to be used as a metric in many applications. However, in some instances, it may be a misleading measure. We discuss that here [...]

2021-10-18T07:45:31-06:00By |Tags: |0 Comments

Lean and Six Sigma in Blood Services

The process of giving blood, separating it into its vital components, and storing and shipping it are all processes that lend themselves to improvement through Lean and Six Sigma methodologies. We’ll take a look at Lean and Six Sigma in transfusion services, blood bank management, and blood donor flow. Finally, we include a short video [...]

LSS in the Publishing and Printing Industries

Printing and publishing are the result of a production process. As a result, Lean and Six Sigma are appropriate methodologies to achieve improvement. We’ll look at a Malaysian case study of applying Lean and Six Sigma in printing. Then we’ll finish with two more general articles: one on Lean Six Sigma generic project definitions in [...]

Why Require Projects for Green/Black Belt Certification?

Why should a project be required for Green Belt or Black Belt certification? The short answer is because a project demonstrates that the Belt can deliver true organizational impact based on their training. While exams assess the trainee’s grasp of a body of knowledge typically through multiple choice and/or true-false questions, only a real world [...]

Control Chart Assumptions

What assumptions must be met to use a standard control chart? What should you do if one or more are not satisfied? We will focus on the Individual’s Control Chart. Three requirements must be met. Independence Normality Subgroup size (n = 1) Independence Independence occurs when the position of one data point does not influence [...]

Edward de Bono – Six Thinking Hats

Got a hard problem to solve? How do you get everyone’s point of view while covering all aspects of the problem? The Six Thinking Hats may help you. Six Thinking Hats is a system designed by Edward de Bono, the world’s leading authority on thinking.  Edward de Bono’s Six Thinking Hats divides thinking into six [...]

Decisions! Decisions! Decisions!

Do you need to make a decision? Are there multiple criteria? Are some of the criteria quantitative while others are qualitative? Are there a group of decision makers involved, some with differing opinions? What you need is Multiple Criteria Decision-Making (MCDM) or otherwise known as Multiple Objective Decision-Making. Much research has been done regarding this [...]

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