Can someone please explain following questions?
1) What is the meaning of "stream-to-stream variation"? CQE Primer (Quality Council of Indiana) says " The distribution of products flowing from different streams (machines, tanks, dies, etc.) may produce variabilities greater than those from individual streams. "What does it mean? Any example?
2) Read the primer, within lot variation minus lot-to-lot variation equals to within stream variation; within stream variation minus stream-to-stream variation equals to within time variation; within time variation minus time-to-time variation equals to within piece variation; within piece variation minus piece-to-piece variation equals to inherent process variation. How to understand that?
Please help. Thanks!
1) What is the meaning of "stream-to-stream variation"? CQE Primer (Quality Council of Indiana) says " The distribution of products flowing from different streams (machines, tanks, dies, etc.) may produce variabilities greater than those from individual streams. "What does it mean? Any example?
2) Read the primer, within lot variation minus lot-to-lot variation equals to within stream variation; within stream variation minus stream-to-stream variation equals to within time variation; within time variation minus time-to-time variation equals to within piece variation; within piece variation minus piece-to-piece variation equals to inherent process variation. How to understand that?
Please help. Thanks!