Reliability HotWire is a monthly eMagazine by ReliaSoft providing information and tips on how to best improve your reliability practices and get the most out of ReliaSoft’s tools for reliability and life data analysis.
This Months Hot Topic
Using Mixture Designs in DOE++
In design of experiments, a mixture is defined as a product that is formed by mixing together two or more individually distinct ingredients, known as the mixture components. In some cases, the properties of the mixture are only dependent on the components and their proportions, and not on the amount of the mixture. For example, one cup of 10% hydrogen peroxide solution in water has the same properties as one gallon of 10% hydrogen peroxide solution in water. In other cases, outside influences such as process variable settings can affect the properties of the mixture as well. For example, the viscosity of a polymer solution will depend not only on the concentration of polymer in the solution, but also the mixing speed because higher speeds can break the polymer chains, leading to shorter chains and therefore a lower viscosity of the mixture. In this article, we describe the four common mixture designs followed by an example using DOE++ that illustrates how to create a mixture design.
For full article, view: Reliability Hotwire – Issue 180 February 2016