INTRODUCTION: To control quality characteristics on the methods, machine, products, equipments both for the company and operators, the Statistical Process Control (SPC) , Statistical Quality Control (SQC), and Quality Improvement methods have been widely recognized as effective approaches for process monitoring and diagnosis. Statistical Process Control (SPC) The primary tool of SPC is the Shewhart control chart. The Shewhart control chart quantifies variant as both special cause or common-cause (natural) fluctuation (Fig. 1). The control limits on control charts quantify variation as that i! nherent to the process (natural variation info inside the control limits), or variation caused by an lawsuit or assignable-cause (special cause variation data located immaterial the control limits). Data outside the control limits are also referred to as out of control points. The composition documented the change...If you want to soak up a sound essay, order it on our website: OrderEssay.net
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