Identifying Parts Obsolescence Early


Parts Obsolescence Management an Ongoing Problem

One aspect of creating a new product or system is the sourcing of parts, components, and materials.

Gone are the days of your organization providing every element of the final product. Henry Ford’s supply chain for early Ford automobiles include their own forests, rubber plantations, and iron ore mines. [Gelderman, 1981]

We increasing rely on the supply chain to create the necessary parts for the design’s functionality. Then to continue to supply those same parts for decades, in some cases. Continue reading

The Wald Wolfowitz Run Test for Two Small Samples


The Wald Wolfowitz Run Test for Two Small Samples

This nonparametric test evaluates if two continuous cumulative distributions are significantly different or not. For example, if the assumption is two production lines producing the same product create the same resulting dimensions, comparing a set of samples from each line may reveal if that hypothesis is true or not. Continue reading

2013 in review


Thanks to you all for a great year. The idea of the blog is to assist those preparing for the CRE exam or wanting to learn about reliability engineering. It seems to have found the audience.

The WordPress.com stats helper monkeys prepared a 2013 annual report for this blog.

Here’s an excerpt:

The concert hall at the Sydney Opera House holds 2,700 people. This blog was viewed about 21,000 times in 2013. If it were a concert at Sydney Opera House, it would take about 8 sold-out performances for that many people to see it.

Click here to see the complete report.