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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  • 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 …
  • The 1 Parameter Exponential Distribution 7 Formulas
    The 1 Parameter Exponential Distribution 7 Formulas This is part of a short series on the common life data distributions. The Exponential distribution is popular and useful in isolated situations. It …

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.