Select Page

Shewhart

Shewhart recognized two types of variation, namely the special-cause variation’ and the ‘common cause variation, he’s the inventor of control charts. The Shewhart model shows two types of variation can be called ‘assignable cause’ and...

Screening Experiments

Screening experiments are lower resolution designed experiments (DOE) for investigating main effects, usually involving several factors. Screening experiments often use Fractional Factorial designs. One of the methods used in the design and execution of experiments is...

Sample Statistic

In statistics, we calculate sample statistics as numerical values directly from a subset, or “sample,” of a larger population. We use these statistics to estimate or infer population characteristics because measuring every single member of a population is...

Sample Size

A well-determined sample size ensures that the research conclusions are valid and applicable to the larger population from which the sample was drawn. Table of contentsDefinition of Sample SizeWhy does the Size of the Sample Matters?Factors Influencing Sample Size...

Risk Priority Number

Table of contentsWhat is a Risk Priority Number?Risk Priority Number FormulaGoalRelated Articles Estimated reading time: 3 minutes What is a Risk Priority Number? The Risk Priority Number (RPN) is a numerical assessment tool commonly used in risk analysis and...