Statistical Process Control (SPC)

1
Statistical Process Control (SPC)

• Utility of Control Charts
• Detect when something is wrong with the process
• Establish what the process is inherently capable
  of achieving
• Help diagnose the causes of abnormal behaviour of
  a process
• Monitor control the process
• Tell when apparent abnormal behaviour is, in
  fact, normal so that the process should be left
  alone

2
Control charts
Changed machine setting New employee or New
material introduction
3
Control charts
Tool being gradually worn down or Gradual
slippage in machine settings
4
Control charts
Three different operators at different skill
levels or sticky setting
5
Control charts
A freak point --- Caution against overreaction
6
Control charts
Deterioration of machine or Decline in operator
discipline