For which of the following should we use an R-chart to monitor process quality?
A) Grades in a freshman "pass/fail" course
B) Tire pressures in an auto assembly plant
C) Vehicles passing emissions inspection
D) Computer software errors
E) Number of units with missing operations

Question

Quizplus · Accepted Answer

An R-chart is used to monitor the variability in a process over time. Tire pressures in an auto assembly plant can vary from one tire to another and from one vehicle to another, so an R-chart would be an appropriate tool to monitor the process and detect any patterns of variation.

For Which of the Following Should We Use an R-Chart