CPK PROCESS CAPABILITY INDEX.docx - REFER TO SLIDE 46 of...

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REFER TO SLIDE 46 of SU3 SEMINAR SLIDES FOR WORKED EXAMPLE Process Capability Index LSL = USL = ´ X = σ = C pk = min [ {( ´ X -LSL)/3 σ } , {( USL - ´ X )/ 3 σ } ] = min [ {( - )/3( ) } , {( - )/ 3( ) } ] = min [ , ] = (LOWEST of 2 choices) Probability of a ________ with less than _______ (LSL): [ By applying LSL value= X , given ´ X and given σ ] z = (X - ´ X )/ σ = ( - ) / () = NORMSDIST( z ) = NORMSDIST( ) = (Probability expressed as numerals with decimals) Probability of a ________ with more than _______ (USL):

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