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Statistical Methods for Quality Improvement by Hitoshi Kume

By Hitoshi Kume

This article is extremely prompt for managers and critical scholars of caliber. significant US businesses factor this reference and coaching handbook to all managers in the course of their caliber education. This quantity can also be very worthy as a stand-alone reference on utilizing statistics with a company and caliber viewpoint.

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However, a more powerful use is to measure the individual times for some number of consecutive cycles. This allows us to compare the variation between cycles by a worker or even compare the variation between different workers doing the same job. This is very useful for pursuing continuous improvement since it can help identify the contributors to variation. The first method we will discuss using the memory stopwatch is aimed at capturing consecutive individual cycles. The method starts out the same as the simple stopwatch method.

In this method, there are several start/stop points, and they occur multiple times each cycle. Notice that the stop point of one component is the start point of the next successive one. In our truck example, recall that we have five work components (for the five stations); then there are five walk components—to get from one station to the next until completion when we return to the first station. So, instead of one time for a full cycle, there are 10 component times. At this point, we start to see the concern for the number of lap memories that are available as they will determine the maximum number of full cycles that this technique can accommodate.

Your individual model of memory stopwatch may have a different button name, but the action of starting the timing is the desired result. 44 ◾ The Standardized Work Field Guide While the stopwatch continues to accumulate the passage of time, observe for the recurrence of the start/stop read point, which indicates the completion of another cycle. However, with a memory stopwatch, we will actuate the appropriate button that stores the time since the last button actuation in memory. In most models, we have seen that this button was referred to as lap, reset, split, and so on.

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