Minitab Quick Tip: Individuals Charts

An Individuals Chart is a tool to monitor variation in a process with continuous data over time. Individuals charts can be used to monitor variables such as costs, temperature, number of invoices processed, amount of waste generated, and more. When you create an Individuals Chart, Minitab calculates control limits for you. The control limits are based on the data and tell us how much variation to expect. Data points outside of the control limits indicate special cause variation. Example 1 An operator wants to monitor the amount of time it takes to setup a machine for a process. To do this, she plots the data using an Individuals Chart to see if the process is stable. Based on the chart,

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