Helping people make business better
Runs Test for Detecting Non-Randomness using Excel The goal of any continuous improvement program is having a process that exhibits a state of statistical control. So, having a way to detect when a process is going out of statistical control is an important feature of a monitoring system. A system that exhibits statistical control yields […]
Testing for normality using Excel is a routine procedure for Quality Engineers. In this post, I’ll show you how to test for normality using the Anderson Darling procedure. Using this procedure we will learn how to compute the Anderson Darling test statistic and p-value for a normal distribution. We will also compute an Anderson Darling […]
In this video tutorial I show how you can estimate the d2 constant and d3 constant. Employing Minitab, we will generate k = 1 million subgroups where each subgroup has n=2 values. Using this simulated data, we will estimate the control chart constants; d2 and d3. For this case, the real value of the d2 […]
Xbar R Chart versus Xbar S Chart I recently got a question from a reader that wanted to know when to use an Xbar R chart versus Xbar S chart. In this post, I will answer that question. Well, the decision to use either of these Statistical Process Control Charts comes down to how the […]
Training with a Purpose Training as a strategy to improve productivity and drive operational excellence PROCESS VERSUS TASK TRAINING Training is often viewed within the context of assisting employees in the completion of tasks as part of an individual’s duties. However, training from a strategic perspective is often overlooked. This changed in the mid 1990s […]
