CQE Exam Dumps : Certified Quality EngineerExam

When subgroups are selected in a way that minimizes the opportunity for variation within a subgroup and maximizes the opportunity to detect variation between subgroups, this subgrouping is known as rational subgrouping. Rational subgrouping is a concept used in control charting to ensure that the data within each subgroup is homogeneous, making it easier to detect special causes of variation between subgroups.References:

Statistical Quality Control by Douglas C. Montgomery.

ASQ Certified Quality Engineer Handbook.

If a quality engineer discovers a situation where unlabeled finished product could be shipped to customers, the appropriate preventive action is to form a team to error-proof the process. This involves identifying and eliminating the root causes of the issue to prevent recurrence, ensuring that processes are robust and error-free.