vidyut bapat

If it makes sense, start monitoring and improving process sigma.

 
 How to plot Dart Chart –
 Plot average on X axis and sigma on Y axis.
Your target is zero sigma at specified average ( on X axis).
The triangle lines with USL and LSL on x axis as base and various sigma value as height are loci for corresponding Cpk values.
Cpk improves as triangles become smaller in height.
Here is an example -…[Read more]

icici  bank in india is implementing ss
you may contact them for thier experience.
Vidyut Bapat

icici  bank in india is implementing ss
you may contact them for thier experience.
Vidyut Bapat

ISO is an excellent starting point point for all Quality improvements.
So start with it.
Vidyut

 It is an important learning point that handling 12 parameters at a time is not an easy task.
Since only one or two of these (or even outside these) parameters are likely to be critical, it is best to find these out and control or optimize.
 This is best done with component search.
Select 5 best carburetor assemblies and 5 worst from a day’s pr…[Read more]

Paul, It seems we need to know more details.
I understand your customer is an assembler and you are a part supplier and he is proving your part is at fault.
Looking from your customer angle, he should conduct a full “component search” and share his findings with you. It will perhaps show that your part together with some other part (parts) are…[Read more]

Marc,
We seem to think alike.
If it is ok with you,I would like  to exchange thoughts/ ideas off the forum . Where can I reach you?
I am at [email protected].
Vidyut Bapat
 
 

Dorian Shainin the engineer pioneered these simple problem solving methods for use by everyone at his work place. Requires very little training and are common sense really.It will be quite a task to give an introduction in this forum, howeverYou can read Keki Bhote’s book – World Class Quality.

 It seems Philips, GM, Daimler-Crysler + many others are using shainin. Thank you for your inputs.It is an excellent tool. The effectiveness of course depends on the person using them. One need not endorse one tool or the other. Each tool has its positive and negative aspects. One should use the right tool for the job and get over it.In my…[Read more]

icici in india is using ss

Marc
I fully agree and support your views.
After learning about shainin  methods, our group solved a 15 year old chronic problem in our electronic components manufacturing unit within 3 months. the defect rate reduced from 8000ppm to literally 0 ppm.
everyone who is interested in rapid improvements should learn and practice shainin.
Vidyut Bapat

there are many.besides mumbai dabawallas; ICICI , videocon are new entrants.All those who want to progress will be using ss as a tool.if you want more details, look up http://www.isixsigma.com/library/content/c010204a.asp

dont defend your parts.
Talk to your  parts instead (try paired comparison )  and find out what is wrong and fix them.
your customer will be happy then.
otherwise he may switchover to your competetion.
With best wishes,
Vidyut Bapat

I understand you are measuring attribute data with 4 level classification –  1 being best and 4 being worst- being rtejected.
Thus aim of your improvement project would be to get products with all 1 s.
If you are taking samples of say 5 – all should be 1.
Consider this parameter as lower the better type – does not matter if it has only…[Read more]

a good reference book for Variable search –
World Class Quality by Keki Bhote/ published by AMACON
For 6-factor situation, what are the total 14 combinations  –
First 2 are +++ +++ and — —, all best and worst combinations. the results also should be reasonably good and bad.
Later list parameters innlikely order of importance ABC D…[Read more]

“It’s very hard to find information about his statical engineering methods”. –
Have you tried the  book by Keki Bhote –  on this subject.
The book title is World Class Quality – And how to make it happen
Vidyut

you may use variable search
with following combinations
ABCDEF
++++++
——
+—–
-+++++  and so on for other 5 parameters.
total 14 combinations.

it seems you are bogged down by statistiacal complexities of DOE
why not then try simple  shainin DOE tools?
you may get results surprisingly fast.
-kumar

you can try 
geocities.com/sigmaquality
for on line training in six sigma.