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Poka-Yoke or “Mistake Proofing”

Poka-yoke (ポカヨケ) is a Japanese term that means “mistake-proofing” or “inadvertent error prevention”. A poka-yoke (mistake proofing) is any mechanism in a process that helps an equipment operator avoid (yokeru) mistakes (poka) defects by...

Poisson Distribution

The Poisson distribution is a way to predict how likely it is that a certain number of events will happen in a specific amount of time or space. These events need to happen randomly and independently, and on average, they occur at a steady rate. For example,...

P & NP Charts

P AND NP CONTROL CHARTS With data of type attributes, np and p charts (np chart vs p chart) can be used. These charts are used to monitor the percentage (p chart), or number (np cart) of defective items within a subgroup. This type of data has only two possible...

One-Way ANOVA

One-way ANOVA (Analysis of Variance) represents a powerful statistical test that compares means across three or more independent groups to determine whether statistically significant differences exist between them. Unlike t-tests that compare only two groups, the...

Null Hypothesis

In Null Hypothesis Significance Testing (NHST), statisticians use this fundamental method to determine whether they have enough evidence to reject a null hypothesis in favour of an alternative hypothesis. Researchers widely employ this method in scientific studies to...
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