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 […]
Six Sigma is a process improvement methodology that uses facts and data to make decisions, not hunches and opinions. It is obviously important that we use facts and data that are accurate and reliable. The more important the decision and the more serious the consequences, the more care we need to take when collecting data. […]
In an earlier article in this series I discussed the use of sample data drawn from a larger population for the purposes of making decisions. The data in the sample must be representative of the larger population in order for it to be useful in decision making. Consider the stock market in general. What is […]
Control charts are a tool to evaluate the performance of a process over time. Think of the process as a river that is flowing past the point where we will collect data. We must decide what to measure, how to measure, where to measure and how often to collect data from the process. The story […]