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CHAPTER 15 Statistical Quality Control

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BOWL OF BEADS

The quality guru Edward Deming conducted a simple experiment in his seminars with a bowl of beads. Many were colored white but a percentage of red beads were randomly mixed in the bowl. A participant from the seminar was provided with a paddle made with indentations so that 50 beads at a time could be scooped from the bowl. The participant was only allowed to use the paddle and instructed to only scoop white beads (repeated multiple times with beads replaced). The red beads were considered to be defectives. Of course, this was difficult to do, and each scoop resulted in a count of red beads. Deming plotted the fraction of red beads from each scoop and used the results to make several points. As was clear from the scenario, this process is ....Chapter 1


  

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