Statistical Process Control (SPC)




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Fred Allen, US

Statistical Process Control (SPC)

According to many, Six Sigma is based on Statistical Process Control (SPC), a method of visually monitoring production processes. In Six Sigma, each business process must be measured and for this often the SPC methodology is used. Aims of SPC are: 1. Adjustment: To detect quickly when a process needs readjustment or repair. 2. Improvement: To find the most urgently needed improvement in the system itself.
 

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0
Alice, China
 

PC

What is the difference between PPK & CPK?

 
0
Lo.Max, China
 

What is the difference between PPK & CPK?"

PPK is measured by unknowed process, cpk is measured by stable process

 
1
Jacques-Alain TIAKO
Manager, France
 

Cpk or Ppk??

Cpk - It's the capability index for a stable process (the process must be in a state of statistical control). The sigma calculation is based on within subgroup variation.
Ppk - It's the performance index (the actual process PERFORMANCE). The estimate of sigma is based on total variation. Ppk must be calculated if less than 100 samples or when the process is chronically unstable but meeting the specifications and in a predictable pattern.

 
2
Ger de Waard
Management Consultant, Netherlands
 

What is the Difference Between PPK & CPK?

In the Six Sigma quality methodology, process performance is reported to the organization as a sigma... Sign up

   

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