In which of the following situations would you use an X-bar chart?

In which of the following situations would you use an X-bar chart?
A . Track the number of defects that are found in each unit.
B . Measure the difference between the largest and the smallest in a sample.
C . Determine the average value of a group of units.
D . Estimate a subgroup variation.

View Answer

Answer: C

Explanation:

An X-bar chart is a type of control chart that is used to determine the average value of a group of units. It is also known as a mean chart. It plots the sample means of subgroups of units over time and compares them with the center line and the control limits. An X-bar chart is useful for monitoring the central tendency of a process and detecting any shifts or trends in the process mean. It is often used in conjunction with an R-chart, which measures the subgroup variation.

References:

Managing Supply Chain Operations, Chapter 9: Quality Management, Section 9.2: Statistical Process

Control, Subsection 9.2.1: Control Charts

CPIM Exam Content Manual, Module 8: Quality, Technology and Continuous Improvement, Section 8.1: Quality Management, Subsection 8.1.2: Statistical Process Control, Subsubsection 8.1.2.1: Control Charts