To many people, the relationship between daily kaizen and statistical process control (SPC) might seem as remote as the relationship between a kangaroo and the past iconic American TV series Friends. And yet, a kangaroo and Friends have a commonality in that each contains a “Joey.” Daily kaizen and SPC also share a special commonality: principles.

Before discussing the relationship between a relatively new cultural habit (daily kaizen) and a relatively older practice that seems to have lost its popularity, sexiness, and appeal (SPC), it’s important to understand a bit of history and how the two are related.

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