Have you ever stepped into line at the grocery store and wondered how long you would be waiting there? This note answers that question by describing the average wait time an item is expected to spend in queue given different input values for service time, inter-arrival time, and the number of service channels (e.g., the number of checkout lines at the grocery store). This note is accompanied by a spreadsheet that allows students to practice the VUT equation with these different input values.
Note on Waiting Lines: Variability, Utilization, and Inventory
by: Eric Svaan
Core Disciplines: Operations Management/Supply Chain
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