After the product process is changed, the parameters used at that time should still be able to be found in historical work orders. Directly covering the process table will make the process records of old batches apply new standards, making subsequent reviews difficult to interpret. There should be a clear relationship between the process version and the work order, and the effective scope of the version also needs to be recorded separately.

How to arrange records and operations

Consider the process sequence, parameter range, inspection requirements and applicable equipment as version content. The new version is reviewed and then released, and the work order or batch from which it is used is specified. If you want to switch the work order being executed, you must register the reason and reconfirm the parameters and inspection steps of the remaining processes.

The process version number should be generated by the system and remain unique, and the revision number of the technical document should be saved separately. The two do not necessarily change simultaneously. The reviewer needs to see the differences before and after the change, especially the new processes, parameter units and inspection conditions. When scanning the QR code on site to enter a work order, the version bound to the work order will be opened by default, and a comparison of the current version will be provided. For parameters that reference external drawings, the version of the attachment must also be checked, so that the parameter snapshot cannot be correct and the drawing link points to the latest file.

Specific scenarios that need to be checked

During acceptance, select an old work order and a new work order, and query their parameter snapshots respectively. Then modify the current process and check whether the old records remain intact. When returning a version that fails the review, modification records should also be kept to avoid that the version number exists and the content cannot be verified.