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Production Line Efficiency by Sabry Shaaban

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Unbalanced Variabilities

Worker Variability

We know from the previous discussion that there are different sources of imbalance in an unpaced line and that all of them have an effect on production performance. One important effect comes from placing workers who vary in the speed at which they work. Some people will work quite steadily at the same or a similar pace over a period of time, and others will slow down or speed up quite significantly over the same time.

If we look back at chapter 2, we will remember that the variability of workers refers to the amount the time taken to complete a task can vary from the average. The measurement we use is referred to as the coefficient of variation (CV) and is calculated as the standard deviation of the ...

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