In every production process certain amount of natural variation will always exist. A major purpose of control chart is to detect the occurrence of assignable cause so that these can be found and the necessary corrective action before a large quantity ...
In every production process certain amount of natural variation will always exist. A major purpose of control chart is to detect the occurrence of assignable cause so that these can be found and the necessary corrective action before a large quantity of non conforming product is manufactured.
But, in many instances Shewhart control chart is not very sensitive to a shift in the value of a parameter. So, cusum control chart for detecting the trend is proposed.
The major findings indicated that cusum control chart for trend detects a assignable cause more rapidly twice than s Shewhart control chart.