Control charts Control charts are useful in following the timely development of quality variables. Figure 1 shows the principles of drawing one control chart: the mean control chart. If the process is running satisfactorily, one expects all means of successive samples to lie inside the upper and lower action limits. The probability of a sample
Authors & references
Professor Emeritus Kauko Leiviskä, University of Oulu
Based on: Leiviskä, K., Methods (Chapter 3). In: Leiviskä, K. (ed), Process and Maintenance Management, (Book 14), Papermaking Science and Technology. 2nd edition. Jyväskylä, 2009, Paper Engineer’s Association/Paperi ja Puu Oy. pp. 28–71.
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