Which of the following would be used to analyze tray line accuracy?

A process control chart is a useful tool for analyzing tray line accuracy because it tracks variations in processes over time. In the context of food service, particularly with tray line operations, this chart helps to monitor consistency and efficiency. By plotting data points representing tray line performance (such as the accuracy of meal delivery or order fulfillment) against time, the chart can reveal trends, identify special causes of variation, and indicate whether the process is in control or if adjustments are needed. This is particularly important in ensuring that meals served meet specific standards regarding accuracy, quality, and timing.

The other tools listed serve different purposes. A Gantt chart is primarily used for scheduling and tracking the progress of tasks over time, while a cause and effect diagram (also known as a fishbone diagram) is utilized for identifying potential causes of a problem rather than analyzing performance over time. Break-even analysis, on the other hand, is concerned with financial aspects, such as determining the point at which revenues equal costs, and does not directly relate to the operational accuracy of tray lines.