statistical quality control

Analysis of Batting Performance of Two Great Test Cricketers using Moving Average and Moving Range Control Charts with 3 control limits

The main objective of this paper is to illustrate the use of Moving Average (M.A) and Moving Range (M.R) control charts with 3δ control limits. These control charts are very useful for the data which are collected over a period of time. The M.A. chart monitors the process location over time, based on the average of the current subgroup and one or more prior subgroups. The M.R. chart monitors the process variation over time. These charts can be useful for evaluating the batting performance or bowling performance of the players in the game of cricket.

Sample Mean Deviation (d) Control Chart based on Six Delta Control limits

A control chart is a graphical device for representation of the data for knowing the extent of variations from the expected standard. The technique of control chart was suggested by W.A. Shewhart of Bell Telephone Company based on three sigma limits. M. Harry, the engineer of Motorola has introduced the concept of six sigma in 1980. In six sigma initiatives, it is expected to produce 3.4 or less number of defects per million of opportunities.