5WhysCorrective Action5 Whys Studywith ResponsibilityDateDefine
symptomA problem well defined is a problem half solvedUse this path
forthe specificAnonconformancebeing investigated(Define
Problem)WHY?ThereforeRoot CausesUse this path to investigate why
the problem was not
detectedWHY?ThereforeWHY?ThereforeBWHY?ThereforeWHY?ThereforeAUse
this path to investigate the systemic root cause (Quality System
Failures)WHY?ThereforeProblem
definitionWHY?ThereforeCWHY?ThereforeWHY?ThereforeBNextReported
byWHY?ThereforeBreak PointDateWHY?ThereforeRevisionReference
PNProduct / ProcessWHY?ThereforeCNextProblem Resolution
CompleteCommunicate to .. Date:Process Change Break Point
Date:Implement System Change Date:Lessons Learned:Team
Members:Javier Rubio Barragn, Cadiz Spain Europe.
A good 5-Why will answer Yes to the five PDCA
questions:PLANDOCHECKACT1. Is the problem statementCLEAR and
ACCURATE?
2. Has the SYSTEMICroot cause(s) beenidentified for all legs?3.
Has IRREVERSIBLECORRECTIVE ACTION(s)been implemented forALL root
causes?4. Has a plan been identifiedto verify theEFFECTIVENESSof
all correctiveactions?5. Has a plan been identifiedto STANDARDIZE
and takeall lessons learned acrossproducts, processes,plants,
functional areas, etc.?Understand the problemExecute the
PlanFollow-upStandardizeA problem well definedis a problem half
solved5-Why:Specific problem: Why did we have the problem?Problem
not detected:Why did the problem reach the Customer?System
failure:Why did our system allow it to occur?
