# CRE Preparation Blog

A WordPress blog focused on aiding those preparing for the ASQ Certified Reliability Engineer exam. The following excepts are from the most recent blog entries. To see the full list of posts, please visit https://accendoreliability.com/creprep/, or click on one of the excepts below.

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- Extended Bogy Testing

Extended Bogy Testing Introduction Extended bogy testing builds on test to bogy (TTB), discussed in a prior article. TTB focused on calculating the number (N) of parts tested to one life bogy, with 0 … - The Non-parametric Friedman Test

The Non-parametric Friedman Test The Friedman test is a non-parametric test used to test for differences between groups when the dependent variable is at least ordinal (could be continuous). The Fried … - Continuous Improvement of the Risk Management Framework

Continuous Improvement of the Risk Management Framework Systems and processes exist in our dynamic world. Each organization and situation is different. Just as there is not one risk management process … - How to Estimate the Number of Failures Next Month

How to Estimate the Number of Failures Next Month Let’s say you have shipped 1,000 products to your customer on January 1st. All are immediately placed into service. And each month since you have rece … - Determine Success Testing Sample Size

Determine Success Testing Sample Size “How many samples do we need?” is a very common question. It is one you will receive when planning nearly any kind of reliability testing. It is a great question. … - The Basics of Planned and Deferred Maintenance

The Basics of Planned and Deferred Maintenance We can plan to do more than we are capable of accomplishing. The remaining items, if they warranty accomplishing become deferred. They roll over to the n … - Data Outliers and Questions

Data Outliers and Questions When looking at a pile of data, sometimes there is a data point that is not like the others. It attracts attention as it is different than the rest of the data. When I spot … - The Detail Necessary in a Risk Management Plan

The Detail Necessary in a Risk Management Plan A risk management plan has to meet your organizations needs as the organization identifies, manages, and mitigates potential and actual risks. The ISO 31 … - McNemar Test

The NcNemar Statistical Test The McNemar test is a nonparametric statistical test to compare dichotomous (unique) results of paired data. If you are comparing survey results (favorable/unfavorable) fo … - The 3 Parameter Triangle Distribution 4 Formulas

The 3 Parameter Triangle Distribution 4 Formulas This is part of a short series on the common distributions. The Triangle distribution is univariate continuous distribution. This short article focuses … - The 2 Parameter Uniform Distribution 7 Formulas

The 2 Parameter Uniform Distribution 7 Formulas This is part of a short series on the common distributions. The Uniform distribution is a univariate continuous distribution. This short article focuses … - The 1 Parameter Poisson Distribution 4 Formulas

The 1 Parameter Poisson Distribution 4 Formulas This is part of a short series on the common life data distributions. The Poisson distribution is a discrete distribution. This short article focuses on … - The 2 Parameter Pareto Continuous Distribution 7 Formulas

The 2 Parameter Pareto Continuous Distribution 7 Formulas This is part of a short series on the common life data distributions. The Pareto distribution is a univariate continuous distribution useful w … - The Quality Triangle and Reliability

The Quality Triangle and Reliability The quality triangle is an admission that every project has design constraints. Note that reliability is rarely listed directly within the triangle, yet reliabilit … - The 2 Parameter Binomial Discrete Distribution 4 Formulas

The 2 Parameter Binomial Discrete Distribution 4 Formulas This is part of a short series on the common life data distributions. The Binomial distribution is discrete. This short article focuses on 4 f … - The 2 Parameter Birnbaum-Saunders Distribution 7 Formulas

The 2 Parameter Birnbaum-Saunders Distribution 7 Formulas This is part of a short series on the common life data distributions. The Birnbaum-Saunders distribution is a univariate continuous distributi … - The 4 Parameter Beta Distribution 7 Formulas

The 4 Parameter Beta Distribution 7 Formulas This is part of a short series on the common life data distributions. The Beta distribution is a univariate continuous distribution. This short article foc … - The 2 Parameter Logistic Distribution 7 Formulas

The 2 Parameter Logistic Distribution 7 Formulas This is part of a short series on the common life data distributions. The Logistic distribution is univariate continuous distribution. This short artic … - The 2 Parameter Normal Distribution 7 Formulas

The 2 Parameter Normal Distribution 7 Formulas This is part of a short series on the common life data distributions. The Normal distribution is a continuous distribution widely taught. It is commonly … - The 2 Parameter Lognormal Distribution 7 Formulas

The 2 Parameter Lognormal Distribution 7 Formulas This is part of a short series on the common life data distributions. The Lognormal distribution is a versatile and continuous distribution. It is sim …

## Course offerings

If you or your team would like a custom CRE prep course, just let me know and we’ll make arrangements to make it happen. I also teach a live 32 hour CRE Preparation course through the

ASQ Silicon Valley Section when we have at least four students. The course runs for the 8 weeks prior to semi annual exam. Learn more about the CRE at the ASQ site.