Professor Emeritus Kauko Leiviskä, University of Oulu
References:
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Free Management Books. Cause and Effect Analysis. [Online] Available from: http://www.free-management-ebooks.com/news/cause-and-effect-analysis/ [Accessed 17th March 2020].
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Olugbenga, H. and Hällås, R. 2011. Investigation on defects occurring in paper production process. A Six Sigma Black Belt project at SCA Edet mill. Master of Science Thesis, Chalmers University of Technology.