The difference between chance cause and assignable cause. How do these terms relate to Deming's system of profound knowledge?

1) Describe the difference between chance cause and assignable cause. How do these terms relate to Deming's system of profound knowledge? 2) According to the text, why did the quality of manufactured goods decline in the US after World War II, and how did Japan take advantage of that situation? 3) Describe the four Japanese terms used in TQM and give an example of how they might apply to the particular project.