Tuesday, January 13, 2009

Alarm V/s Shutdown V/s Control

B. Alarm V/s Shutdown V/s Control :
Alarm : Signals in form of buzzers, blinking lights are to warn when an abnormality, has occurred (defect) / about to occur (predict)

Shutdown : Normal function of machine or process is stopped when defect predicted / detected.

Control :
1. In Prevention type Poka-Yoke : control means that even intentional errors are impossible or methods by which the cause of defect if starts happening, it is automatically prevented from happening (feedback mechanism)
2. In Detection type Poka-Yoke : Control means that the process is not stopped but the defective items are automatically separated out & are not allowed to pass on to next stage.

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