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Due to long lines at the deli counter, a grocery store implemented a take a number system as shown below. A display over the
Due to long lines at the deli counter, a grocery store implemented a "take a number" system as shown below. A display over the counter showed the number currently being served so that customers could get a feel for the length of time it might take to be served. Finally, a yellow light was added to the display for sales associates to signal when additional help was needed. What technique is demonstrated by the grocery's deli process?
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