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What is C Bar Chart?

C chart is again also a statistical quality control tool, this is a control chart and it uses the counting type of data, typically the total number of unconformities units per for each. And this is also used the monitor the total number of events that are occurring in a given unit of time for the activity.

This chart is different from the p chart because it accounts for the possibility of more than one inspection unit of nonconformity. This chart requires a fixed type of sample size. The inspection of the pass and fails is only when the c chart and u chart also give the ability or permission to make the difference between two items that are failing in the inspection. Types of locations are also helpful to track unconformities.

Monitoring of the c chart includes the following;

  1. It monitors the number of voids per inspection unit in an injection molding process.
  2. This monitor numbers the discrete components that must be resold.
  3. This also monitors the number of products that return per day.

The assumption for making the charts because the basis of the chart is the Poisson distribution.

  1. The potential location of the units is very large in numbers.
  2. The probability of units is small and constant at any location.
  3. The procedure of inspection will be the same for each sample and this will be carried out for each sample.