Sergei

Thank you, Darth. You are right. it’s 97 463 for 100 000.
So, the one chance to reduce the sample size is to try to use variable data. Am I right?
In this case, what should we do, if we can’t  gather continuous measure because of nature of a product (for example almost all data at food industry is attribute)?
I agree also that we have to be c…[Read more]

I got the formula from one Six Sigma book and I don’t know exactly how it works and why it is true. I just hope that it’s right formula. Anyway it helps to get smaller sample size according to someone opinion.
The formula: if m/N > 0.5 then use  n = m/(1+m/N)
‘N’ is the population size.
‘m’ is sample size not taking into consideration po…[Read more]

Thank you all for a replies. In fact it was teoretical question. Nevertheless we can take reasonably truthful data below.
Population size: 100 000.
Desired confidence level: 0,95
Current proportion defective: about 0,0001
Desired precision: 0,00001
I can define the sample size here and it is 3 841 070 not taking into consideration the…[Read more]

It’s all about audit and consulting company. The project is about to reduce the time of arrangement of tax and business accounting at client organization.
The main CTQC’s are time of projects, a project team have to be unchanged during the project, there have to be no idle reference and other.
Unfortunately there is few data availible. Time dat…[Read more]

Thanks for reply. I learned a BB course through the internet.And now my Company tries to improve processes and smth like this by itself. I’m working in consulting and it happened that in the measure phase I just have bare figures and it’s not applicable to use tools as G&G, Pareto, Histogram and other. Is it a normal situation? Are there points t…[Read more]

Hello. It’s interesting for me. Please forward your case study to: s_baumaval.ru .  Thanks a lot!