Fontanilla

There is only 1 constraint at a time. Once you resolve a contraint, there will be a new constraint. But there is only 1 contraint restricting system performance at a given time.

I think the tutor is wrong. The value of defects and opportunities is not an intellectual exercise but needs to point to real-world solutions. The “art” of dpmo is not defect counting, that’s the easy part, it’s the opportunities.

Assuming the goal here is to focus limited resources on problems, the opportunities for “dints” in the bodywork…[Read more]

I would be looking for a way to get more frequent measurements of performance – is there a reason the data is only available quarterly?
Sometimes implementing a more effective measurement system is a key deliverable of a Six Sigma project (before you can even improve the process).
I’d also consider whether 100% quality rate is really…[Read more]

There is some free online training here:http://www.six-sigma-analyst.comAlso consider the American Society for Quality (ASQ) for certification. It is very well respected internationally.

There are some sample size calculators available here that may help:http://www.six-sigma-analyst.com/calculators.php

Perhaps considering historical error rates will help to explain this one. If you look at the history of the process, does the previous data allow you to see the performance over a bigger sample? That may help them to think it through.

Hi Bower,
I’d love to see that spreadsheet for d2 calculations too.  Thanks.
[email protected]

I have a similar issue. I’m not currently employed and am taking a Green belt course for general knowledge. I need a project to work on. I’m looking into pro bono work for my town or non-profits. I live in Fairfield CT. Any ideas?

Please send me a copy of the card drop game also…
[email protected] you…

Jsev607, Gary’s right.  You can set up the limits in advance.  I’ve done it too, and it does show you very quickly if you have a shot at success, or need to stop and revise things, before you make a bunch of scrap.  It works.  Calculate based on your customer requirements, your known process performance (or bench marked performance if a new pro…[Read more]

I totally disagree with your statement, “I won’t care if a part takes 1 run today and the next part takes runs, as long as a part is getting better with each run.”  That, my friend, is a wasteful process.  I’ve seen projects where people thought exactly the same thing.  In one case, we had product that sometimes “came in” in 2 tests, sometimes in…[Read more]

I’m assuming you’ve already created Pareto charts of the various failures, correct?  What’s the most common failure?  When does it occur?  Have you also plotted these failures on a diagram of the product and looked for patterns with respect to the location of the failure?  For example, you find a high occurrence on one area as opposed to ano…[Read more]

Sounds as though you are trying to answer a textbook question.  Is that the case?  Or, is this a real-world problem?

They work for me.  I discussed yours and Stan’s contention that .001mm isn’t possible without interferometry or other optical means with one of them yesterday.  He got a good laugh out of it. 

1) A “mechanical gage” is one that uses a mechanical mechanism to measure the sample, either directly or indirectly.  Often, mechanical gages include a fixture which securely positions the sample, and an indicator which touches the sample.  Indicators may be mechanical or electronic.  They may measure length, runout, roundness, diameter, etc. 
2…[Read more]

To quote your own posting of a few days ago (on a different topic), “You’re wrong.”
Only I’ll provide some further explaination rather than just point out someone’s error and walk away…
Interferometry is called for in certain situations.  We do use it here when measuring in the sub-micron level.  It works very well, particularly when m…[Read more]

Chris, I’ll contact you separately regarding your questions.  And yes, I measure on some gages to .001mm, not inches.  I’ve not measured in inches in years.

In fact, it is you and Andy U who’ve been shown the water but instead, turned your noses upwards and walked away.  You’ve presented nothing to support your claims yet remain steadfast in your assumption that I am somehow wrong in my data and my processes.  I fail to understand how you two could be so stubborn in your refusal to accept that m…[Read more]

You really are showing how little a person you are.  “Read the entire site”??  Really.  You send a link to one page and then expect the reader to peruse the entire site to find your one reference.  The insinuation that I could have hacked the site and re-written the text is also quite insulting.  Grow up.
And, maybe you’ve missed the posting wher…[Read more]

Nice that you’ve taken George’s words and added your own interpretation to them.  No where in that link is the word, “anvil” used.  That’s really great.  Twist the context to fit your view.  Really big of you. 
 You’ve also demonstrated you don’t know what a micron is.  .002mm (2 microns)  = .000080″ (80 millionths).  NST standards are certifie…[Read more]