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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...

NVA or Non-Value Added

Non-value added (NVA) is a management term related to the lean manufacturing movement as codified in the 1980s by a landmark MIT study of the automobile industry, which explained lean production for the first time. It can be defined as an operation that does not...

Non-Value Added

Table of contentsWhat is Non-Value Added?Benefits Reducing Non-Value Added ActivitiesRelated Articles: Estimated reading time: 3 minutes What is Non-Value Added? In business and manufacturing contexts, “non-value added” refers to activities or processes...
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