Statistical Process Control (SPC)

Six Sigma
Knowledge Center

Best Practices

Sign up

Fred Allen

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.



What is the difference between PPK & CPK?


What is the difference between PPK & CPK?"

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

  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.

  Ger de Waard
Management Consultant, Netherlands

What is the Difference Between PPK & CPK?

In the Six Sigma quality methodology, process perf (...)

Start a new forum topic


More on Six Sigma
Six Sigma for Marketing
Add Standardization to DMAIC Phases in Six Sigma (DMAICS)
Identifying Critical Characteristics
Differentiating Six Sigma from TQM
Six Sigma is a Story!
Evaluating Six Sigma Project Leaders
Best Practices Lean Six Sigma in Social Care
Quality Lessons in Dealing with Contractors
Six Sigma Manufacturing Example
Six Sigma Dictionary - Six Sigma Terms
Six Sigma in Textile / Confection Industry
6 Sigma in Construction Industry
6 Sigma....Frame period
Six Sigma Implementation Process
Good Practitioner Books on Lean - Six Sigma, S&OP?
Organizational Development + Six Sigma or Lean
Should Six Sigma start after Lean Implementation?
Six Sigma In Inbound Call Center
🔥Sustaining Momentum of Process Improvement over Time
Disadvantages of Lean Six Sigma. Drawbacks
Lean 6 Sigma in Laboratories
Lean Management in Retail
Quality Critical Factors
Six Sigma Approach Part I
Six Sigma Black Belt Certification
Applying Six Sigma to Landscape Architecture
Next Step after Voice Of Processes have been Defined?
Six Sigma Department
Best Practices
3 Additional Six Sigma Levels
The Basis of Six Sigma? Statistics and Discipline
Six Sigma Organization Structure
Six Sigma in an R&D context
The 5 x Why Method (The 5 Whys)
Focus of Six Sigma: The 6 Rights
Is Six Sigma Enough? (To Improve the Quality Level of an Organization...)
Statistical Process Control (SPC)
Tools for Finding Root Cause?
Evaluating Six Sigma Projects
Six Sigma DMAIC and DMADV
Six Sigma Requirements
Hypothesis Testing in DMAIC Projects
Six Sigma in Medical Transcription
Six Sigma Implementation Roles
Six Sigma for Retail
The Cost of Poor Quality: Tools for Effective Control & Reduction
Six Sigma Effectiveness
Six Sigma in Passengers Handling
Special Interest Group

Are you interested in Six Sigma? Sign up for free

Notify your students

Copy this into your study materials:

and add a hyperlink to:

Link to this discussion

Copy this HTML code to your web site:

Six Sigma
Knowledge Center

About 12manage | Advertising | Link to us / Cite us | Privacy | Suggestions | Terms of Service
2021 12manage - The Executive Fast Track. V15.8 - Last updated: 20-4-2021. All names of their owners.