Why - Why Analysis (Breakdwon Maintenance)
This is an example of Why why analysis of Breakdown Maintenance
In Breakwdown we should start why with the action taken to fix the breakdown.
we should do this breakdown after fixing the problem and then we can find the
1. Current root cause
2. Potential root causes
1 comment:
Dear Pankaj,
First & foremost, to make any correct Root Cause analysis, it is important to do the sequential questioning on the Gemba. Involve all present or those associated with the phenomena in this reasoning.
Next, I see that the physical phenomena described in this Why-Why needs a careful assessment. Breakdown phenomena necessarily means the manifestation is into a functional stoppage of the machine. A Breakdown phenomena should be reported as seen by the operator thro his five senses. Here in this example did the spindle head stop rotating ? Then the breakdown phenomena can be "Spindle not rotating in auto cycle". Those points mentioned here are the intermediate causes of this phenomena.
I need some more information to comment further. Whether the spindle actually stopped rotating or was it producing a defective component ? If it is latter, then the Why-Why analysis will actually take a different path.
The sequential reasoning done in this Why-Why actually misses out some important stages in between. Hence, the correct root cause is not evident. If it would have been a weak design, this phenomena would have occured every time the machine runs or operates. However, it is evident that this happens after some time.
This need further discussion.
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