" »It is generally not possible simply to maintain a level of process performance. A process will tend to erode no matter what, even if a standard is defined, explained to everyone, and posted. […] Any organized process naturally tends to decline to a chaotic state if we leave it alone. […] A process is either slipping back or being improved.« "

― Mike Rother, , Toyota Kata: Managing People for Improvement, Adaptiveness and Superior Results