A predictable change in operators for the day shift and night shift can create assignable variation called a cycle.

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A cycle is a type of assignable variation that can occur when there is a predictable pattern or change in the process, such as a change in operators between shifts. This can result in differences in the way the work is performed or in the types of errors that are made, which can lead to variation in the output. By identifying and controlling for cycles, process improvement teams can help to reduce variation and improve overall performance.

A Predictable Change in Operators for the Day Shift and Night