Hypothesis Testing in DMAIC Projects

Six Sigma
Knowledge Center

 

Next Topic

Six Sigma > Best Practices > Hypothesis Testing in DMAIC Projects

Hypothesis Testing in DMAIC Projects
Zafar Kamal, Consultant, Canada, Member
Is hypothesis testing a must in DMAIC projects? Why (not)? (...) Read more? Sign up for free
 

Please register now to read all responses and to join this discussion yourself. It's easy and 100% free.

    Log in

 
Hypothesis Testing in DMAIC?
Jens Folke, Consultant, Denmark, Member
Sometimes a DMAIC project can be based on Six Sigma process mapping only, i.e. SIPOC/IPO/C&E/FMEA, and the process check is a revisit to the RPN of the FMEA. In other cases you may not have a sufficiently large sample size to conclude, e.g. 2 proportions sometimes require thousands of samples, so the answer is no: not mandatory.
 

 
Hypothesis Testing in DMAIC
Zafar Kamal, Consultant, Canada, Member
Dear Folke, thanks for your comment, I agree 100%. What happens if we eliminate hypothesis evaluation for any data?
 

 
Yes - Hypothesis Testing is Needed
James
If the solution is known, just implement it.
Otherwise DMAIC is a method to determine solutions when unknown. DMAIC uses various tools/techniques to sort out/drill down for potential causes. Then make a hypothesis ("Cause A impacts the result") and use facts/data to validate the cause before implementation. If you don't test your hypothesis the wrong potential solution may be implemented. HOW the hypothesis test is conducted may be a better question. But the idea behind hypothesis testing is valid for all DMAIC projects.
 

   

   

 
Decision Making on an Incomplete Data Base
Jens Folke, Consultant, Denmark, Member
(...)
 

 
Depends on Cost and Benefits of Implementation
Jagdish B Acharya, Consultant, India, SIG Leader
(...)
 

 
Hypothesis Testing in DMAIC is not Always Necessary
Georges Van Cauwenbergh, Management Consultant, Ireland, Member
(...)
 

   

 
Samples and Populations and Hypothesis Tests
Ger de Waard, Management Consultant, Netherlands, SIG Leader
(...)
 

         
Special Interest Group Leader
Jagdish B Acharya
Consultant

Six Sigma
Summary
Forum
Best Practices


Six Sigma
Knowledge Center

 

Next Topic



About 12manage | Advertising | Link to us / Cite us | Privacy | Suggestions | Terms of Service
2020 12manage - The Executive Fast Track. V15.3 - Last updated: 26-1-2020. All names of their owners.