Když se něco pokazí, obzvláště v rozsáhlé organizaci, může existovat instinkt, který by ukázal prsty a posun viny. To pravděpodobně nejde o nejlepší způsob, jak tomu zabránit v budoucnu. Sakichi Toyoda, zakladatel společnosti Toyota Motor Company, vyvinul proces "5 Whys", typ analýzy příčin, který identifikoval a vyřešil problémy, které vznikly v rámci společnosti. Od té doby byla široce přijata jako součást štíhlé výroby, metody Kaizen a Six Sigma.
Root Cause Analysis - 5 whys - Five Whys - Genchi Genbutsu philosophy
Storyboard Text
Skluzavka: 1
Gary has noticed the widgets coming through his station are defective.
Skluzavka: 2
Gary reports the problem to his boss, and they decide to perform a quick 5 Whys analysis, along with a couple of Gary's co-workers.
Skluzavka: 3
Widgeter Mk. II
The team articulates the problem and builds a linked chain of causation back to the root cause: the secondary widget punchers aren't being cleaned enough.
Skluzavka: 4
The team uses Storyboard That to map out a new protocol for widget puncher maintenance that is easy to understand and follow.
Skluzavka: 5
Gary's boss uses the storyboard as part of her report to upper management, reassuring them that the source of the defects has been eliminated.
Skluzavka: 6
There are no more defective widgets! The manufacturing process has been improved, and everyone is ready to get back to making the product.