Friday, July 4, 2008

5. Minor stoppage & idling losses

The definition of these losses is as follows:
• Losses that are accompanied by temporary functional stoppage
• Losses allowing functional recovery through simple measures
(removal of abnormal work pieces and resetting)
• Losses that do not require parts exchange or repair
• Losses that require from 3-5 seconds to less than 5 minutes for recovery.

Unlike failures, minor stoppage/idling losses represent the condition in which equipment stops or idles because of temporary problems; for example, a work piece clogs a chute, or a sensor is triggered by a quality defect, temporarily stopping the machine. In this case, if the work piece is removed and resetting is done, the machine will operate normally. Thus, this condition is different in character from equipment failure

This loss affects Performance Rate, OEE & OPE

GENERAL PROBLEMS ON MINOR STOPPAGES

• Efforts to actualize as losses are not sufficient.
• Actions taken are poor
- Only emergency measures are taken as temporary measures.
• Phenomena are not discerned fully.
• Obstruction to un-attended operation.
- Operators are used for restoration.
- Minor stoppages keep operators from operating multiple stations or machines.- One minor stoppage will ruin the effects of unattended operation during breaks

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