Question

In: Math

true or false: control charts are a useful tool for tallying the number of defects.

Expert Solution

The answer for the question is true. Control charts are useful in checking and controlling the number of defects. C-chart is used to monitor the number of defects in the given subgroup of products. C-chart follows the Poisson distribution with parameter denoting the average number of defects.

The control limits for the c-chart for known standards are

Central Line(CL) =

Lower Control Limit (L.C.L.) =

Upper Control Limit (U.C.L.) =

The control limits for the c-chart, when standards are not known, are given by

Central Limit (C.L.) =

Lower Control Limit (L.C.L.) =

Upper Control Limit (U.C.L.) =

where,

c= number of defects observed in each of the K samples.

where

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milcah answered 1 year ago

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