Sampling Plans: Choosing The Right One

Determining the appropriate sampling method to use is often confusing for green belts and black belts.  Statistical sampling is a highly useful quality tool as long as we follow the basic concepts and understand the various sampling methods.  The first three methods we’ll look at fall under the category of probability sampling.  They are: Random Sampling Stratified Sampling Systematic...

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Basic Sampling Concepts And Practical Considerations

Sampling is one of the most critical activities that occur in every project. The problem is that most of us don’t get it right. This article will attempt to explain the fundamentals of sampling, why it is essential to understand these concepts, and some practical considerations to think about. Let’s start by understanding what we mean by a representative sample. A sample is...

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