From my knowledge, we cannot estimate uncertainty just by knowing the Gauge R and R Results, there are many more factors which we need to condider in uncertainty budgeting
ISO – GUM gives a very clear estimation methods for various situations.
I am well aware about the measurement uncertainty principles and the result of the uncertainty budgets, but i had also started doing Gauge R and R studies in my factory with regard to my customer requirement and six sigma drive.
I am under the confusion that which method is more appropriate, can i really go with one single method and validate all…[Read more]
I am already into all these tools like APQP and Web enabled follow ups
what i wanted to ask ,what objectives (common yard stick) like u mentioned would this progarm have
Dealing with vendors on development have issues like
1.timely deliveries to the action plan
sitting in a sourcing office what should be…[Read more]
i am new to this forum and site,i thought of having opinion on how six sigma could be useful or on the ideas how six sigma could be implemented in this feild.
most of my work goes into inviting queries into new parts ,then developing them and streamlining vendor’s time plan and processes .
Confusion is how six sigma can be used as umbrella…[Read more]
The long term issue of Cpk and Ppk often become irrelevant if your process is under statistical control. If your process is under control, and has been for a while, and it shows no sign of deviating from being under control (as per control charts and so forth) then what happens is that your actual process variance, calculated from the raw…[Read more]
Its like this. Cpk and Ppk differ on just one fundamental aspect. The kind of variation used to compute them. Cpk uses the variation computed using Rbar, whereas Ppk uses the s.d of the data itself. Now, like the indices are called Cpk is for capability, and Ppk is for performance.
It all depends on what you want to do with the…[Read more]