The Elsmar Cove Business Standards Discussion Forums More Free Files Forum Discussion Thread Post Attachments Listing Elsmar Cove Discussion Forums Main Page
Welcome to what was The Original Cayman Cove Forums!
This thread is carried over and continued in the Current Elsmar Cove Forums

Search the Elsmar Cove!

Wooden Line
This is a "Frozen" Legacy Forum.
Most links on this page do NOT work.
Discussions since 2001 are HERE

Owl Line
The New Elsmar Cove Forums   The New Elsmar Cove Forums
  Statistical Techniques and 6 Sigma
  six sigma formulas and tables.

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   six sigma formulas and tables.
WALLACE
Forum Contributor

Posts: 46
From:Ontario, Canada.
Registered: Nov 2000

posted 06 May 2001 09:38 PM     Click Here to See the Profile for WALLACE   Click Here to Email WALLACE     Edit/Delete Message   Reply w/Quote
I am looking for a list of Six Sigma formulas and the explanation of these formulas with sigma and yield tables, Any body help?
Thanks in advance.
Wallace.

IP: Logged

Ken K.
unregistered
posted 08 May 2001 09:06 AM           Edit/Delete Message   Reply w/Quote
I think you need to be more specific about formulas you're asking for.

I'll give you a few and see if that's what you're asking for:

DPU=Defects/Units

DPMOp=DPMO=PPM=Total 1,000,000*(Defects/Opportunities)

DPMOp=1,000,000*(DPU/Opportunities

SIGMA = SQRT(LN(1/(1-EXP(-DPMOP/1000000))^2))-(2.55155+0.802853*SQRT(LN(1/
(1-EXP(-DPMOP/1000000))^2))+0.010328*SQRT(LN(1/(1-EXP(-DPMOP/1000000))^2))^2)/
(1+1.432788*SQRT(LN(1/(1-EXP(-DPMOP/1000000))^2))+0.189269*SQRT(LN(1/
(1-EXP(-DPMOP/1000000))^2))^2+0.001308*SQRT(LN(1/(1-EXP(-DPMOP/1000000))^2))^3)+1.5

where DPMOP=defects per million opportunities

First Time Yield=
#UnitsPassing1stInspection/#UnitsInspected
approx= e^-DPU

RolledUpYield=
#UnitsCompleteingProcess/#UnitsProcessed
approx= e^(DPU1+DPU2+DPU3...)
where DPU1, DPU2, DPU3 represent the defect rate of process steps 1`, 2, 3, ...

Also try http://www.isixsigma.com/offsite.asp?A=Fr&Url=http://www.qualitydigest.com/mar00/html/sixsigma.html

Also check out some of the information on http://www.isixsigma.com

IP: Logged

WALLACE
Forum Contributor

Posts: 46
From:Ontario, Canada.
Registered: Nov 2000

posted 09 May 2001 05:28 PM     Click Here to See the Profile for WALLACE   Click Here to Email WALLACE     Edit/Delete Message   Reply w/Quote
Thanks Ken k,
I am just getting started in six sigma and, I feel overwhelmed by all of the Mathematical formulas that are used to calculate the most common used functions of six sigma, I guess I need to get familiar with the most commonly used calcualtions.
Wallace.

IP: Logged

Greg Mack
Forum Contributor

Posts: 37
From:Sydney, NSW, Australia
Registered: Feb 2001

posted 10 May 2001 02:57 AM     Click Here to See the Profile for Greg Mack   Click Here to Email Greg Mack     Edit/Delete Message   Reply w/Quote
Just take the normal factors for computing central lines and 3 sigma control limits for X-Bar, s and r charts.

A cpk of 2 equals 6 sigma.

That's probably about as basic as it gets.

IP: Logged

All times are Eastern Standard Time (USA)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply Hop to:

Contact Us | The Elsmar Cove Home Page

Your Input Into These Forums Is Appreciated! Thanks!


Main Site Search
Y'All Come Back Now, Ya Hear?
Powered by FreeBSD!Made With A Mac!Powered by Apache!