Sigma waarde van een proces: aantal standaard deviaties tussen het gemiddelde
en de specificatie limiet.
- Six Sigma-> kwaliteit processen, niet gemiddelde uitkomst telt maar
reduceren van de variantie.
DPMO (Defects Per Million Opportunities)
Het bereiken van Six Sigma:
- Reductie van de variantie – de standaarddeviatie
- Centreer het proces
- Vraag de klant de specificaties te verruimen
Lean:
- Doel:
Klantwaarde produceren!
Flexibel, korte doorlooptijden (Lead time)
Efficiënt, lage voorraden (WIP=OHW) – Just in time, reduceren ‘waste’.
Lean stappen:
1. Specificeer waarde voor de klant
2. Identificeer waarde-stroom en verwijder waste
3. Zorg voor flow
4. Zorg voor pull
5. Ga uit van perfectie
Value stream map (2. Waarde-stroom en waste)
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