topic Re: OC Curve in Discussions

OC Curve

Behrouz — Thu, 08 Jun 2023 16:35:54 GMT

Does anyone know why I get this error message when I am using OC Curve function in JMP 17 and trying to change AQL and RQL values?

Re: OC Curve

MRB3855 — Wed, 15 Feb 2023 12:29:14 GMT

Looks to me like the x-axis is actually plotting 1-AQL and 1-RQL. So, 1-AQL should be less than 1-RQL.

1-AQL < 1-RQL implies -AQL < -RQL implies AQL > RQL in this platform. So, assuming everything else is correct, your desired AQL, call this AQL*=1- AQL. As an example, if you want your AQL to be 0.1, put 0.9 in the "AQL" box. Similar for RQL. This is all very counterintuitive...not sure if this is a bug or intentional?

Re: OC Curve

jacob_rhyne — Wed, 15 Feb 2023 23:23:49 GMT

Hi Behrouz and MRB3855. Thank you for the feedback on OC Curves.

I think what's going on is there are two definitions of AQL and RQL. Suppose we will accept a lot if the defect rate is less than 0.1. From your responses, I believe you define AQL = defect rate = 0.1. In JMP 17.0, the OC Curves define AQL = 1 - defect rate, which here is 1 - 0.1 = 0.9. (RQL is defined similarly)

This definition is used by some (such as in the reference below from the STAT Center of Excellence). However, we have received additional feedback that this definition is counterintuitive and the developer of the OC Curves plans to address this in a future release (so that the OC Curves will use the definition AQL = defect rate).

Re: OC Curve

Behrouz — Mon, 20 Feb 2023 07:44:46 GMT

Hi Jacob

Thanks a lot for explanation and letting me know that I am not the only one that got confused by the definition of AQL/RQL :-). I don't really see the idea of plotting the RQL/RQL lines.

Re: OC Curve

Behrouz — Mon, 20 Feb 2023 07:45:26 GMT

Thanks a lot for clarifying this.

Re: OC Curve

Behrouz — Fri, 14 Feb 2025 11:03:12 GMT

And I will be happy if someone can guide me to remove RQ/AQL lines. It is confusing

Re: OC Curve

Behrouz — Fri, 14 Feb 2025 11:51:52 GMT

I found the script to remove the lines