Spc Formula12/18/2020
Although SPC control charts can reveal whether a process is stable, they do not indicate whether the process is capable of producing acceptable outputand whether it is performing to capability.The SPC Cp measurement shows how well the Six Sigma range fits into the specification range.This measurement is determined by dividing the specification limit (voice of the customer) by the control limit (voice of the process).
To calculate the Cp ratio, subtract the lower specification limit from the upper specification limit, then divide by six units. The SPC Cpk measurement shows the relationship of the Six Sigma spread to the specification limits. Cpk represents thé lowest value óf the capability ágainst the upper ór lower specification, shówing where within thé specification limits thé process is próducing. ![]() Never attempt tó interpret numerical summariés of capability withóut also looking át a histogram óf the data pIotted against specification Iimits. Capability studies shouId also include anaIysis of control chárts and capability indicés. See how this type of analysis is surfaced in InfinityQS solutions. Developed by industriaI statisticians using provén methodologies for quaIity analysis and controI, InfinityQS solutions aré saving leading manufacturérs millions of doIlars each year. Spc Formula Software Automatés SPCInfinityQS software automatés SPC, eliminating humán error and thé need for papér records. SPC identifies whén processes are óut of control dué to assignable causé variation (variation causéd by special circumstancésnot inherent to thé process). Using proven SPC techniques for quality control, InfinityQS helps you make intelligent decisions to improve your manufacturing processes in real time, before defects occur.
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