Defects Per Unit - DPU

	Bookmark This Page Email This Page Format for Printing Post A New Term

 

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

D

Defects Per Unit - DPU New from iSixSigma 5th Annual iSixSigma Global Salary Survey Research Report Wave Solder Process Improvement Project Example 4th Annual iSixSigma Global Salary Survey Research Report DPU or Defects Per Unit is the average number of defects observed when sampling a population. DPU = Total # of Defects / Total population Consider 100 electronic assemblies going through a functional test. If 10 of these fail the first time around, we have a first pass yield of 90%. Let's say the 10 fails get reworked and re-tested and 5 pass the second time around; the 5 remaining fails pass on the third attempt. Feel free to work out how this would look as a rolling yield. (100 'passes'/115 tests). DPU takes a fundamentally different approach to the traditional measurement of yield. It is simply a ratio of the number of defects over the number of units tested (don't worry about how many tests or how many opportunities for defects). In the above example, the DPU is 15/100 or 0.15. There are 100 units which were found to have a cumulative total of 15 defects when tested. One interesting feature of DPU is that if you have sequential test nodes, i.e. if the above 100 units had to go through 'Final Test' and threw up a DPU figure of 0.1 there, you simply add the DPU figures from both nodes to get the overall DPU of 0.25 (this is telling you that there were 25 defects in your 100 units). There are a few assumptions which must be realised for this statement to be wholly accurate, but there isn't really time to go there in a 'definition' space. _________________ If out of the 100 loans applications there are 30 defects, the FTT yield is .70 or 70 percent. Further investigation finds that 10 of the 70 had to be reworked to achieve that yield so our Rolled Throughput Yield is 100-(30+10)/100 = .6 or 60 percent yield. To consider the defects per unit in this process we divide the number of defects by the result of multiplying the sample by the number of opportunities in each item. No.of defects/(no. of units)*(no. of opportunities for a defect)= 30/100*3 = 30/300 = .1 or we would say that there is a 10 percent chance for a defect to occur in this process. Posted By: Jim Johnson Modified By: Last Modified: Jul. 4, 2003

"The Bottom Line" Links

BMG Upgrade Your Skills Master Black Belt Certification Get the industry's most Flexible, Robust Program for Professionals >> Find out more

VILLANOVA UNIVERSITY   Earn Your Lean, Green or Black Belt Six Sigma Master Certificate Online BOOST YOUR SALARY! *$38k more than uncertified counterparts. Learn From Industry Leaders!   START NOW

SIGMAPRO MBB, Lean Sigma, & DFSS   when experience matters most...

M O T O R O L A U N I V E R S I T Y Learn from the most experienced practitioners of Six Sigma in the world Public Training & Certification Click here to take a free Six Sigma Lesson

J URΛN   Lean Six Sigma Public Workshops Atlanta, GA - Sept 2008 Become one of your organization's 'vital few'. Get Juran Certified.

HOWARD UNIVERSITY Now offering Process Simulation ! 4 weeks + 1 cost saving project + 1 mentor + 1 caring instructor = 1 Marketable Certified Lean Six Sigma Black Belt

WINSTON SALEM STATE UNIVERSITY Now offering Process Simulation ! 4 weeks + 1 cost saving project + 1 mentor + 1 caring instructor = 1 Marketable Certified Lean Six Sigma Black Belt

THE UNIVERSITY OF TEXAS AT AUSTIN 2 weeks + 1 project = Black Belt Certification

. Find us on LinkedIn Join the iSixSigma Network and Connect with Other Six Sigma Pros .

Download the iSixSigma Toolbar for 1-Click access. Search Your Way. Everyday. Without Delay.

BEST SELLING PRODUCTS (iSixSigma Publications) 2008 VERSION! Six Sigma DMAIC Training Slides The OSSS Six Sigma DMAIC course is comprised of:1,176 slides, Instructor notes, Slide explanations, 37 data sets, 20 sup... NEW VERSION! Process Management Training Slides The OSSS Process Management course is designed in two phases comprised of:352 Powerpoint slidesInstructor notesSlide exp... Gage R&R Excel Template Gage Repeatability and Reproducibility (R&R) studies measure the amount of measurement variation that is attributabl... Certified Lean Six Sigma Black Belt Assessment Exam This test is useful for students interested in assessing their knowledge of Lean Six Sigma on the Black Belt level. It c... Certified Lean Six Sigma Green Belt Assessment Exam This assessment exam is useful for students interested in assessing their knowledge of Lean Six Sigma on the Green Belt ... Customer Identity Verification Project Example The credit card division of TD Bank Financial Group receives more than 3.7 million customer calls per year. Research s... Design of an Operational Risk Management System Project Example Great Lakes Finance Company (GLF), a small Michigan-based retail and commercial lender, experienced several severe opera... Sell Your Products