Machine oil is used by clothing manufacturers to lubricate and protect sewing machines. A company that produces machine oil must ensure that the viscosity of its product meets customer requirements. Consequently, the viscosity of every batch of oil produced is measured. Suppose that the process mean is 101 cP and the process standard deviation is 1.50 cP. What type of chart should be used to ensure the process remains in control?
A) p chart
B) c chart
C) R chart
D) Control chart for individual observations (run chart)
E) ARL chart

Question

Quizplus · Accepted Answer

A control chart for individual observations (run chart) is appropriate for monitoring the viscosity of machine oil because it deals with continuous data (viscosity measurements) and tracks the performance of a process over time to ensure it remains within specified control limits.

Machine Oil Is Used by Clothing Manufacturers to Lubricate and Protect