Mahalanobis distance and reliability methods

October 17, 2011 | Leave a Comment

Traditional Mahalanobis distance is a generalized distance, which can be considered a measure of the degree of similarity (or divergence) in the mean values of multiple characteristics of a population, considering the correlation among the characteristics. It has been used for many year in clustering classification and discriminant analysis. Mahalanobis distance is attributable to Prof.P.C. [...]

Oct

16

Harry & Sally and the Bathtub

October 16, 2011 | Leave a Comment

The other day I was thinking about my Reliability Blog and it led to my thinking about CURVES, especially those most common in Reliability Engineering. We regularly use the Gaussian function and the Weibull Chart, but as far as my experience goes, the Bathtub Curve has been the most popular way to visually summarize the [...]

Oct

8

Integrating Simulation into a Reliability Program

October 8, 2011 | 2 Comments

We are giving a free webinar on Tuesday, October 11th at 11:30am. Simulation and testing often go together as part of a strong reliability program. Finite element simulation provides data and insights that would be difficult or impossible to obtain from testing alone. Simulation gives results for all components, including those that are inaccessible, and over a [...]

Oct

4

Reliability Specifications

October 4, 2011 | Leave a Comment

Reliability Specification The importance of accurate and clearly specified product requirements can not be overstated. The reliability specification is usually part of a larger document, called the product specification or product requirements document. This document contains information such as the product description, performance specifications, environmental requirements, electrical interface specifications, physical specifications and reliability specifications. [...]