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...Aulas praticas exercicios solucoes a calculate the control limits for x bar and r charts based on first samples reflecting process before any problems were denounced sample screw mean range average double from page cja d so as explained in book pages ff chart ucl lcl solucoesap doc b plot labeling data points upper lower center lines both means ranges of all but use calculated number c do you feel that production is there something suspicious graphs confirm customers complaints are justified it really seems if variation diameters has increased significantly suggests significant differences even within single clearly some corrective measures have to be taken bring this back under suppliers manufacturing weeks i e when quality alloy did not seem an issue week flaws per proportion p n proportions create spc including weekly line defective fractions interpret what does suggest s v t f o...