Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

ASSESSMENT OF THE PROCESS STABILITY OF COTTON YARN COUNT BY MEANS OF VARIABLE AND ATTRIBUTE CONTROL CHART ON A SPINNING MILL (Pages : 32 - 39)

A production process is said to be in control when the quality characteristics of a product are subjected only to random variation (or common cause variation) that is variation in process performance due to normal or inherent interaction process components (people, machine, material, environment, and methods). Whenever variable data are used, a combination of two charts, chart monitoring the mean and chart monitoring the spread are used, and usually single chart is used for attribute data. Specification limits are based on product or customer requirements. If all the data points are within the control limits, be sure to check the other signals that indicate special cause of variation. This paper provides an analytical study of statistical process control of yarn count by 3? control charts of variable and attributes control charts which are commonly used.Download