A control chart is best described as:
a. a statistical tool used to determine and control process variations.
b. a graphical record of a process variable measured over time.
c. a picture of the activities that take place in a process.
d. a simple bar graph with classifications along the horizontal and vertical axis. The vertical axis is usually the number of occurrences, cost or time. The horizontal axis orders the bars from the most frequent to the least frequent.
Answer: A
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