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Study U Chart lecture notes PDF with total quality management definitions and explanation to study What is U Chart?. Study u chart explanation with TQM terms to review total quality management course for online MBA programs.

U Chart Definitions:

  1. U chart is a graph of the average number of defects per unit.

    Managing Quality: Integrating the Supply Chain by S. Thomas Foster



  2. A control chart based on the average number of nonconformities per inspection unit is called u chart.

    Introduction to Statistical Quality Control by Douglas C. Montgomery



U Chart Notes:

U chart is a type of attribute control chart which is used when the sample size is greater than 1. It shows the average number of non-conformities in a unit. When using u chart, the size of one subgroup can be different from another. In case of u charts, items in a subgroup can have multiple defects. Control limits for u chart are established using the already defined formula. Usually, lower control limit of a u chart is calculated to be a negative number, so zero (0) is used as the lower limit of u charts. U charts are plotted based on Poisson distribution.

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