Transcription of Process cap for PDF - ASQ
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Process cap for PDF - ASQ
March 2006 Copyright 2006 Sanjaya Kumar SaxenaProcess CapabilitybySanjaya Kumar SaxenaThe capability of a Process is a statistical indicator of how well it is functioning, or, inother words, how successful it is at running within its specified the absence of any special orassignable causes ofvariation, a Process will still havesome inherent variability. Process capability is a statistical measure of this we wish to set up a Process for manufacturing ordinary washers, thin diskswithholes in the middle, used to support the loads of threaded requirement is that our washers should have an inner diameter of cm. This is thetarget, or mean. A maximum acceptable variation is cm. Any variation beyondacceptable limits is considered a defect. For example, a washer having an inner diameterof cm will be marked as put, the inner diameter specifications are cm. This tolerance or acceptable variation is cm(the spread of tolerance). lower specification limit, referred to as LSL, is cm ( ).
Copyright © 2006 Sanjaya Kumar Saxena 2 Table 1 presents four common mathematical expressions to compute process performance under different contexts.
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