Analysis of the influence of non-machining process parameters on product quality by experimental design and statistical analysis

Yurtseven, Saygın
This thesis illustrates analysis of the influence of the non-machining processes on product quality by experimental design and statistical analysis. For the analysis objective ; dishwasher production in Arcelik Dishwasher plant is examined. Sheet metal forming processes of dishwasher production constitutes the greatest portion of production cost and using the Pareto analysis technique; four pieces among twenty six pieces are determined to be investigated. These four pieces are the U Sheet, L Sheet, Inner Door and Side Panel of the dishwasher. By the help of the flow diagrams production process of the determined pieces are defined. Brainstorming technique and cause&effect diagrams are used to determine which non-machining process parameters can cause pieces to scrapped. These parameters are used as control factors in experimental design.Taguchi̕s L16(215) orthogonal array, Taguchi̕s L16(215) orthogonal array using S/N transformation and 28-4 fractional factorial design are used on purpose. With repetitions and confirmation experiments the effective parameters are determined and optimum level of these parameters are defined for the improvements on scrapquantity and quality of production.


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Citation Formats
S. Yurtseven, “Analysis of the influence of non-machining process parameters on product quality by experimental design and statistical analysis,” M.S. - Master of Science, Middle East Technical University, 2003.