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) Chart for individual observations (run chart)
E) ARL chart

Question

Quizplus · Accepted Answer

A chart for individual observations, or a run chart, is appropriate when monitoring the process mean and standard deviation for continuous data like viscosity, especially when measurements are taken one at a time.

Machine Oil Is Used by Clothing Manufacturers to Lubricate and Protect