Statistical Significance and Practical Significance

When we work on process improvement, we need to check our results to see if the output of the process was changed for the better.  There are two ways to evaluate the results, practical significance and statistical significance.  We need to verify that the results are significant in both respects.  At the risk of stating […] read more

The Transformation Function: Y = f(X)

Six Sigma is focused on improving the performance of processes.  In simple terms, processes have inputs, activities, and outputs.  The process activities transform the inputs that come from suppliers into a product or service that is delivered to a customer. Consider baking a cake.  The inputs are ingredients such as eggs, flour, milk, butter and […] read more