There appears to be some leeway for bulk suppliers like my company(ie, aluminum, ingot, coil) regarding PPAP Rev 3 Cpk/Ppk requirements. I'm not sure that my interpretation is correct but if a supplier-designated key characteristic is not in statistical control, then the reporting for PPAP should be by Ppk. We use a monthly Cpk/Ppk report to satisfy ongoing process capability (since our customer has no key characteristics identified for us). We have a prior interal audit nonconformance written against a process with a Cpk < 1.33. For the last 8 months the Cpk has been > 2 but this past month, the process was not in control (out of control points were investigeated with no assignable cause found)so, Ppk was used on the capability report. Now, the Ppk is < 1.33. Can I close the nonconformance based on the prior 8 months or should I leave it open and shoot for > 1.33 on both Cpk and Ppk, even though this is a supplier designated key characterstics.