第1話Chapter 1
The substation that kept failing
止まり続ける変電所
A 3kV traction substation broke down about 1.1 times a week. A Lean Six Sigma DMAIC project found the cause and took it to near zero.
Boughton substation. December 2020.
Another breakdown?!
About 1.1 failures every week.
A 3kV traction substation the trains depend on.
No guessing. Lean Six Sigma, DMAIC, one phase at a time.
Follow the data.
The five phases:
Define. Measure. Analyse.
Improve. Control.
Each one signed off before the next began.
Root cause: failing PCB components.
Near zero!
Breakdowns: from 1.1 a week to near zero.
Quiet week.
Full sign-off on every DMAIC phase, and measurable operational benefits.
End of chapter 1
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