Evaluating Gage Bias and Linearity

In an earlier article in this series, I introduced some basic issues in measurement systems analysis such as granularity, accuracy, reproducibility, repeatability, stability and linearity.  In this article we will explore in more detail how to evaluate the performance of a measurement system with respect to bias and linearity. Gage bias examines the difference between […] read more

Failure Modes and Effects Analysis (FMEA)

Failure Modes and Effects Analysis (FMEA) is a form of risk analysis that should be applied when designing or changing products and processes.  FMEA is a methodical seven step approach to analyzing a product or process for ways that it can fail, and then taking appropriate actions based on this information.   We will explain the […] read more

On April 15th, 2016, posted in: Six Sigma by Tags: ,

Overall Equipment Effectiveness (OEE)

A metric that is commonly used in Lean Six Sigma is Overall Equipment Effectiveness, or OEE. OEE can be used to help target key areas for improvement. It is a way to measure equipment performance in three major areas where losses or waste may occur. Although OEE is most commonly applied in manufacturing, it can […] read more

On February 16th, 2016, posted in: Articles, Six Sigma by Tags: , ,

Issues in Process Control

Earlier in this series I introduced the topics of Process Capability and Process Control. You may wish to review that article before reading this one. I recently received the following query from one of my Green Belt students: “In my company our manufacturing process has a lot of special variations which makes the process very unpredictable. […] read more