O
OmarEn
Hi Guys,
I have three situations trying to do a Cpk with unilateral tolerance. I hope you guys can give me some advice on this.
1. I want to conduct a CPK for a diameter that is 10.0mm +0.1 -0.0
2. I want to conduct a CPK for a diameter that is 10.0mm minimum (it does not have a maximum limit).
3. I want to conduct a CPK for a flatness of 0.3mm.
As you may know, flatness tolerance is an absolute value. It means that the spec is maximum 0.3mm since there is not a possibility to have a value less than 0 since 0 would be a perfect flatness.
I am trying to complete this in Minitab but I do not know if it is possible to calculate ability for processes with this kind of tolerance.
thanks in advance for your time.
I have three situations trying to do a Cpk with unilateral tolerance. I hope you guys can give me some advice on this.
1. I want to conduct a CPK for a diameter that is 10.0mm +0.1 -0.0
2. I want to conduct a CPK for a diameter that is 10.0mm minimum (it does not have a maximum limit).
3. I want to conduct a CPK for a flatness of 0.3mm.
As you may know, flatness tolerance is an absolute value. It means that the spec is maximum 0.3mm since there is not a possibility to have a value less than 0 since 0 would be a perfect flatness.
I am trying to complete this in Minitab but I do not know if it is possible to calculate ability for processes with this kind of tolerance.
thanks in advance for your time.