Ronald
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Ronald replied to the topic Attribute MSA Study in the forum General 15 years, 1 month ago
Hi Ozler,
I’m working on resolving an attribute gauge issue and your spreadsheet appears to be of much help to many. Could you please send a copy? Thanks much.
My address is [email protected] 
Ronald replied to the topic Six Sigma Companies in the forum General 15 years, 2 months ago
I’ve noticed most of you are very poor spellers and even worse writers. For all the hype surrounding Six Sigma, I’m not impressed. If most of you spoke they way you wrote, we’d be in a world of hurt.
I think anyone has the right to question a system that is so hyperfocused on the problem and not the solution. It’s really easy to jump on board a…[Read more] 
Ronald replied to the topic MSA, Distinct Categories and 5.15 in the forum General 15 years, 2 months ago
Cynic
The alegbra is correct.
DR=SQRT[(Variance Total+ Variance ParttoPart)/(Variance Measurement System)]
where Variance Measure=Variance TotalVariance PtP
thus
DR=SQRT[((Variance PtP)+(Variance Measurement)+Variance PtP))/(Variance Measurement)]
THIS IS WHERE THE 2 COMES IN (2*Variance PtP) RESULTS.
DR=SQRT[[2*(Variance…[Read more] 
Ronald replied to the topic Communication Questions in the forum General 15 years, 2 months ago
Offer them psychiatric help here:
http://www.psychiatrichelp.org/PSYCHIATRICHELP/default.asp 
Ronald replied to the topic Lean Six Sigma Simulation in the forum General 15 years, 3 months ago
Simon
I would also appreciate a copy of this. Much appreciated.
Thanks
Lee
[email protected] 
Ronald replied to the topic Six Sigma application in service industry in the forum General 15 years, 6 months ago
Allan, coincidently I am also doing a small research for sharing with my students in the same area. Appreciate if you can forward some info on the application of Six Sigma in the Service Industry. A simple example or case study should be good enough.
I also welcome feedback on a practical application of Six Sigma in the manufacturing in…[Read more] 
Ronald replied to the topic smaple size for proportions in the forum General 15 years, 8 months ago
Shiva
If you know or can estimate the proportion of the population or have historical data, use the resulting p and q from that in the sample size equation (it will give you a smaller sample size)
If the p is unknown, then use p=0.5 and q=0.5 as the product is the highest possible value of p*q possible (pq=0.25) and will provide a very large…[Read more] 
Ronald replied to the topic Supplier Auditing Using Six Sigma in the forum General 15 years, 9 months ago
Evaluating POTENTIAL suppliers is not the same as monitoring existing suppliers, so using “6sigma tools” has limited opportunity, but you can still use this approach. For example, potential suppliers don’t have data relative to product they’ve made for you, so they typically present best case examples. Since they’re not doing business with y…[Read more]

Ronald replied to the topic Cpk Combined vs Individual Cavities in the forum General 15 years, 10 months ago
In a previous life as a Supplier Quality Engineer, I ALWAYS stated, either upfront in a qualification requirements document, or in a control plan, how I wanted my suppliers to evaluate & monitor capability. During qualification of a new multicavity tool, or for reparis/major changes to an existing tool, I always required cap studies for each…[Read more]

Ronald replied to the topic Project Doomed to Fail in the forum General 15 years, 10 months ago
Like a bandaid, just yank if off fast. Don’t recommend, just demand and don’t do anything else on it.

Ronald replied to the topic Project Doomed to Fail in the forum General 15 years, 10 months ago
Like a bandaid, just yank if off fast. Don’t recommend, just demand and don’t do anything else on it.

Ronald replied to the topic Six Sigma in Romania in the forum Europe 16 years, 3 months ago
I have led Six Sigma program for a stainless steel company in Romania for 2 years as MBB. I wanna share with you guys our experience.
You can reach me at [email protected]
Good Luck! 
Ronald replied to the topic Audit Sampling in the forum General 17 years, 4 months ago
Thanks for the reply Rajesh !
I was thinking of the same but I don’t know if it has a statistical basis. If I stratify the group, how many of them would I get for audit? Say, out of 400 people and from there I was able to form 3 groups. One group composed of 100 people. How many samples will I get to say that I have covered them all in terms of…[Read more] 
Ronald replied to the topic Quality Slogan in the forum General 17 years, 4 months ago
Inspired by Scott Adams’ Cubicle Hell:
“Quality Approved Products” QAP
“Let’s make QAP”
“QAP Assured”
“QAP Champions” and “QAP Teams”
Call it what it is! 
Ronald replied to the topic R R and confidence limits in the forum General 17 years, 4 months ago
Hi Statman,
I am interested in that spreadsheet too. Would you kindly send to my email at [email protected]
Many thanks.
Cheers 
Ronald replied to the topic Measuring an uncertain event in the forum General 17 years, 4 months ago
Anand,
Here how I would approach it:
If you do a analysis with cost/benefits associated with the probability of occurrence, it should show the likely or expected outcome.
Assume 99.99% of the time the process works well and only costs $100 per year to maintain. But with a 0.01% chance of failure it would cost the company $1 million. The…[Read more] 
Ronald replied to the topic when pvalue is close to .05 in the forum General 17 years, 5 months ago
I have always taught this in terms of cost benefit:
1. If the cost of a wrong decision is high and the gain is low in comparison to the cost, you probably want 95%99% confidence.
i.e. Gambling $500,000 dollars to win $1000 you want to know you have a 9599% chance of winning.
2. If the cost of a wrong decision is low and the gain is high, you…[Read more] 
Ronald replied to the topic Show me the Money in the forum General 17 years, 5 months ago
One of my past projects reduced the cycle time in paying Brokers commission who were bringing in new business. Didn’t significantly reduce cost (1.5 FTE saving) but increased Broker (customer) satisfaction enormously evidenced through feedback surveys before and after. Brokers stated more likely to place business with us. All this positive…[Read more]

Ronald replied to the topic Mortgage Lending Improvement in the forum Finance 17 years, 5 months ago
Zach,
Some ideas:
1. Originations (Underwriting, Conveyance, Valuation processes) – look at what’s driving turnaround time – from receipt of a customer application to the transfer of funds. Expected drivers could be forms incorrectly filled, parts of application missing, backlogs in the processes etc.
2. Servicing of mortgage loans – what is d…[Read more] 
Ronald replied to the topic Log data transformation when data is zero… in the forum General 17 years, 6 months ago
I’m dealing with data which have zero value (more than half of them) and are skewed. So I am thinking ln(x + a). Can I know some scientific literatures which have justification of this transformation?
Thanks!
Lee :)  Load More