We are using a shadow boards for kitting many parts at each of the many work stations. The customer wants me to list this as "Error Proofing" but she list this issue under her pfmea complaints for the same ppap and not the control plan portion of the ppap. I'm leaning toward that she made a mistake and that ERROR PROOFING goes into the CONTROL PLAN portions of the PPAP. Since it is about Control. Thanks for all your input. Much appreciated.