How do I Know What Product or Process Characteristics to Control?

While the construction of control charts is relatively straight-forward, often a more difficult question is “how do I know what process characteristic to control in the first place?” Clearly, controlling “everything” is not feasible or a smart use of limited...

10 Keys for Maximizing the Benefits of your SPC Program

Statistical Process Control charts have been called the Voice of the Process. Progressive manufacturers utilize control charts to “listen” to their processes so that potentially harmful changes will be quickly detected and rectified. However, not all SPC programs...

What is the Philosophy of Process Control (Rather than Product Control)?

What is Quality? Ask people involved with the design and manufacture of a product the following question: “What is Quality?” Many if not most of the responses will be some form of the following: “Quality is ensuring that our products meet the customer (or engineering)...

Analyzing the Experiment (Part VI)

In the last Blog, we explored the use of contour plots and other tools (such as a response optimizer) to help us quickly find solutions to our models. In this blog, we will look at the uncertainty in these predictions. We will also discuss model validation to ensure...

Analyzing the Experiment (Part V)

In the last Blog, we learned how to work with predictive models to find solutions that solve for desired responses.  We used some basic algebra to solve for solutions and looked at the use of contour plots to quickly visualize many solutions at a glance.  In this...