A
Afternoon all (or morning to those of you far away from Britain!)
Looking for some advice:
We machine tapers on hip joints (amongst many other things). These are currently CMM inspected for spigot angle. However we have had some issues with rejections from the customer which measure fine on the CMM when we get them back. It turns out they are using air gauging to measure the angle & diameter.
Anyways along with our process improvements to reduce variation, we are equipping ourselves with identical equipment as the customers goods inwards inspection.
My plan was to perform a GR&R on each method using the same parts - however this would not give me a direct comparison.
The question is - how do I directly compare each piece of equipment? Some mention has been made of a "Two tailed T Test" that will give me the answer. However I neither know what one of these is or what to do to perform one effectively. (We do have Minitab by the way).
Any advice is greatly appreciated.
Looking for some advice:
We machine tapers on hip joints (amongst many other things). These are currently CMM inspected for spigot angle. However we have had some issues with rejections from the customer which measure fine on the CMM when we get them back. It turns out they are using air gauging to measure the angle & diameter.
Anyways along with our process improvements to reduce variation, we are equipping ourselves with identical equipment as the customers goods inwards inspection.
My plan was to perform a GR&R on each method using the same parts - however this would not give me a direct comparison.
The question is - how do I directly compare each piece of equipment? Some mention has been made of a "Two tailed T Test" that will give me the answer. However I neither know what one of these is or what to do to perform one effectively. (We do have Minitab by the way).
Any advice is greatly appreciated.