In production which of the following indicates under filling

In production, which of the following indicates \"under filling\"? Under filling occurs when a plotted value is both above the chart\'s upper limit and below the chart\'s lower limit. Under filling occurs when a plotted value is above the chart\'s upper control limit. Under filling occurs when a plotted value is between the chart\'s upper and lower control limit

Solution

d. Underfilling occurs when a plotted value is below the chart\'s lower control limit.