Kannan

I have already made it clear

Plot the data in using Box Plot. Then you can decide on the buckets basis the outcome.
Descriptive stats also would throw some light on the CI of mean, median etc. You may choose to change the significance % as you wish. You may take -CI, Mean and +CI

Its is not as good as ASQ.

Good one Bower

Would appreciate if someone posts a useful learning

Whats the harm in using different charts. It would look neat as well
 

Also it is confused to be an effeciency measure over speed measure.
 

Waynej, what is the rational behind 7 samples that they pick up from each lot. You have all the reason to be worried. If your customer understands statistical concepts then you will have to face less challenge. Your curve and customer’s curve would be very close to each other in a long run. Even for it to be so, right sampling at…[Read more]

I Guess he means the extreme values. Stan, then what is the reason for the coeffecient to decrease assuming that he is removing the extreme values?
 

Hi there. This is a example of negative correlation. as u keep reducing the extreme values the coefficient. Also this could be because of the non linearity in the data sets of x and y. I would not be surprised if the coeffecient reaches near 0 and then starts increasing again after u remove many data points.

i second annon. Just to add. Process capability analysis entails comparing the performance of a process against its specifications. We say that a process is capable if virtually all of the possible variable values fall within the specification limits. Cpk assumes that the data  is normally distributed. The calc for Cp= ((USL-LSL)/6s).
We can…[Read more]

Hi All
I am very much impressed with the discussion. We are in confusion on the following.
How much % of Outliers can be allowed for Removal from a data set?
Regards
Kannan
 

Hi ,
Customer satisfaction should be in detail not only four category ie , quality
price
delivery
response
these factor when we give a score sheet to customer, they score as they wish
if some criteria set like eg, no of lots accepted versus rej should be the factors to rate on quality
then the assesment by customer would be more…[Read more]

Please email me your Lean SS Case Study
Email: [email protected]
 
Thanks,
Kannan

Hi Cactus,
This is a question I often used to ask myself in my early days as a black belt. It almost feels when you finish the project charter you have completed measure phase. But the truth is if you are convinced there is a problem you have seen at some data. So you need to be able to make a Problem Goal Statement that is a combination of…[Read more]

Thanks for your response. I do know the Y and the Y is Delivery Time. I agree with you on both being Xs but this is only to establish a relationship. Also just for you to know the salesman as per a moods median test (non-normal data) is not a critical X. I am still not clear of using a regression equation for discrete Xs.