Assignable cause, also known as a special cause, is one of the two types of variation a control chart is designed to identify ...

Uses of Shewhart Charts . 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 ...

Key Points p-Charts are a control chart used to see nonconforming data in a set of data. They can be used to pinpoint issues ...

Assignable variation- in process output, a variation whose cause can be identified . Control chart- a time-ordered plot of sample statistics, used to distinguish between random and nonrandom ...