Salt Lake City, Utah
June 23, 2018
June 23, 2018
July 27, 2018
Throughout his life, Deming could not emphasize enough the importance of understanding variation. In fact, Variation is one of the four pillars of his System of Profound Knowledge. The other three are Appreciation for a System, Theory of Knowledge, and Psychology. Lloyd S. Nelson was quoted saying that the central problem in management and in leadership is failure to understand information in variation.
This paper examines the effects of process tampering on variation when the process is stable or in control. It will show that reacting to common causes of variation as if they are special causes will only lead to increase in variation and the likelihood of producing unacceptable output. To do so, the experiment was conducted by students in three stages. The first stage is the “control” stage where no action was taken and the process operated as is. In the second stage, the students were asked to make adjustments and hit the target region. The third stage represented taking the proper – long term – action. That is, an investment by management to reduce variation and optimize the process. Finally, the three stages are compared next to each other on a statistical process control (SPC) chart.
Shraim, M. (2018, June), Impact of Process Tampering on Variation Paper presented at 2018 ASEE Annual Conference & Exposition , Salt Lake City, Utah. https://peer.asee.org/30605
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