EME6403 - Quality Control

Dr. L.Anneberg, Ph.DDr. L.Anneberg, Ph.D

Fall 2001Fall 2001

Office: E215Office: E215

Phone: 248-204-2539Phone: 248-204-2539

Introductions Email is great: anneberg@ltu.eduEmail is great: anneberg@ltu.edu Course online comment form:Course online comment form:

www3.ltu.edu/~anneberg/qc.htmlwww3.ltu.edu/~anneberg/qc.html Course homepages:Course homepages:

www3.ltu.edu/~annebergwww3.ltu.edu/~anneberg www4.ltu.eduwww4.ltu.edu

login: XX33333 password: 33333 [student ID]login: XX33333 password: 33333 [student ID]

www.blackboard.com/courses/EME6403/www.blackboard.com/courses/EME6403/ Enter as ‘guest’Enter as ‘guest’

First Homework

Part 1Part 1 Find an interesting item on www.asc.org about QUALITY, mildly edit Find an interesting item on www.asc.org about QUALITY, mildly edit

it down to 100 words or lessit down to 100 words or less Copy and paste, count words [must be less than 100]Copy and paste, count words [must be less than 100] Electronically communicate to me:Electronically communicate to me:

email to me [TEXT ONLY, no attachments!!]email to me [TEXT ONLY, no attachments!!]

Part 2:Part 2: make a comment on make a comment on www3.ltu.edu/~anneberg/qc.htmlwww3.ltu.edu/~anneberg/qc.html

don’t be anonymous, so I know who you are!!don’t be anonymous, so I know who you are!!

American Society for Quality and Quality in Manufacturing Wonderful resources for info, especially Wonderful resources for info, especially

when the class is overwhen the class is over ASQ has certification programs: Quality ASQ has certification programs: Quality

Engineer, Reliability Engineer, etc.Engineer, Reliability Engineer, etc. www.asq.org AND www.asq.org AND

www.qualityinmfg.comwww.qualityinmfg.com Juran and Deming are among the VIPs of the Juran and Deming are among the VIPs of the

quality genrequality genre

More Introductions

I have an online questionnaire that you must I have an online questionnaire that you must fill out… [homework #1]fill out… [homework #1]

www3.ltu.edu/~anneberg/qc.htmlwww3.ltu.edu/~anneberg/qc.html I want to get a good email list going, and also I want to get a good email list going, and also

know what topics you’d like to seeknow what topics you’d like to see EXTRA CREDIT opportunities:EXTRA CREDIT opportunities:

find my dissertation/title/year: email me 1 linefind my dissertation/title/year: email me 1 line find a marathon time of min: email me 1 linefind a marathon time of min: email me 1 line

SQC = Statistical Quality Control

Montgomery, our course book author, also Montgomery, our course book author, also has a SQC book [I use this as a reference - has a SQC book [I use this as a reference - he also has a Statistics, Probability, and he also has a Statistics, Probability, and Prob/Stat book, among others]Prob/Stat book, among others]

Quality Improvement leads to increased Quality Improvement leads to increased productivityproductivity

80/20 rule - Pareto handout80/20 rule - Pareto handout

Seven major tools of SQC

HistogramHistogram Check SheetCheck Sheet Pareto chartPareto chart Cause and Effect fiagramCause and Effect fiagram Defect Concentration diagramDefect Concentration diagram Scatter diagramScatter diagram control chartcontrol chart

Control charts help reduce variability Idea: you calculate a middle line [average], Idea: you calculate a middle line [average],

and upper/lower lines, based on historical and upper/lower lines, based on historical datadata

Then you let the process proceedThen you let the process proceed if you get points outside the UCL/LCL, if you get points outside the UCL/LCL,

worry [or maybe 3 points in a row].worry [or maybe 3 points in a row]. Main types are X bar and R -avg/rangeMain types are X bar and R -avg/range

X bar chart

The center line is X double bar, the average The center line is X double bar, the average of the averages…of the averages…

in other words, X bar is the average for one in other words, X bar is the average for one day. X double bar is the average of these day. X double bar is the average of these averagesaverages

R is the Range, R bar is the average of theseR is the Range, R bar is the average of these The UCL/LCL are +/- [R bar][A2]The UCL/LCL are +/- [R bar][A2] A2 is from your chartA2 is from your chart

Homework for SQC

Do a control chart. checksheet,pareto Do a control chart. checksheet,pareto diagram,histogram for your book problem diagram,histogram for your book problem 2.52.5

For extra credit: do a control chart for For extra credit: do a control chart for something in your life/jobsomething in your life/job

2.5 doesn’t have a bunch of days to do 2.5 doesn’t have a bunch of days to do averages on, but have X bar be X double averages on, but have X bar be X double bar, and R bar be R….. bar, and R bar be R…..

Homework summation

Questionnaire: Questionnaire: www3.ltu.edu/~anneberg/qc.html AND www3.ltu.edu/~anneberg/qc.html AND COMPLETE!!COMPLETE!!

Go to Go to www.blackboard.com/courses/EME6403 www.blackboard.com/courses/EME6403 and add some item from ASQ or and add some item from ASQ or Qualityinnmfg.com to the discussionQualityinnmfg.com to the discussion

Small data analysis…..Small data analysis…..