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Control charts are used to determine the process _____.
capability
Control charts provide _____ data to allow manufacturers to analyze problems on a piece of equipment.
historical
A control chart allow _______ to fix problems before bad parts are produced.
operators
Plot data over time with a control chart s the best way to predict the _____of a process?
future performance
Statistical process control has two types of data. Which one is mostly used with go/no go gauges?
Attribute
Variable and attribute data are used to define what type of chart?
Control chart
When making a yes-or-no decision, what type of sampling should be used?
Attribute sampling
Which control chart tracks two aspects of data?
X-bar and R chart
Processes that run in control are considered _______manufacturing processes
capable
The X-bar chart relies on averaging measurements of parts. What is the other calculation plotted on the R chart?
range
The _____ chart plots the average value of each subgroup
X-bar
The data for an X-bar and R chart places time intervals on the X-axis and what other data from the sample on the Y-axis?
Measurement units
________employees in the plant benefit when defect trend data is collected and problems are corrected
All
In an unstable process, the mean of the measurements is outside the control limits of the process. The process should be
investigated
What often happens if operators make adjustments to recently produced parts based on recent measurements? Part variations _____
increase
When only one point is outside the X-bar or R chart control limits, what special cause may have occurred?
power surge
