Process Control with R
Engineers usually associate statistical process control (SPC) with a set of charts to monitor whether the outputs of a process are in or out of control. This is the classic approach to quality control (QC) and consists of adjusting processes only when their outputs are out of control. Under this approach, inspection is a standard way to proceed. One of the goals of modern QC is to reduce the need for inspection. The Six Sigma process aims at sustaining the improvements achieved throughout the other stages of the DMAIC cycle. Under the Six Sigma paradigm, control is established over the variables affecting the critical to quality characteristics. In this chapter, we first introduce some concepts of mistake-proofing strategies for process control. Then, control charts and their representation with Rare explained. Finally, other topics related to SPC are touched upon along with the available Rpackages.
KeywordsControl Chart Control Limit Exponentially Weight Move Average Statistical Process Control Lower Control Limit
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