A control chart plots measured values along with upper and lower quality control limits. Values appearing outside these limits are unacceptable and could indicate a manufacturing problem. Although ...

Control charts play a fundamental role in ensuring and improving the quality of manufacturing items. These charts consist of upper and lower limits, within which manufacturing operations should ...

Statistical process control (SPC) is a key methodology used to improve product quality and ensure process stability. Among the various SPC tools, control charts are most commonly used because of their ...

Youíll learn how to select the right attribute data control chart, and how to create those control charts. These include the NP Chart, the P Chart, the U Chart and the C Chart. To do this you must ...

The Shewhart chart is named after Walter A. Shewhart (1891-1967), a physicist at the Bell Telephone Laboratories, who introduced the method in 1924 and elaborated upon it in his book Economic Control ...