Procedure qualification records, revision histories naming the author, internal training material, job files and equipment adaptation records, exported before any system migration or retirement.
Preserve first, describe later
Evidence in a working shop is fragile in a way that nobody notices until it is needed. Servers get replaced, drawing systems are consolidated, paper files are cleared out when a building changes, and the people who remember which job first used a procedure move on. Export and copy the relevant records at the start of the process rather than at the point of drafting. The material worth preserving is specific: qualification records for procedures developed in-house, revision histories that show who authored what and when, training material written internally, purchase and modification records for equipment adapted to a particular use, and job files linking the person to the work. Describe it afterwards, from the records themselves.
Begin a technical evidence index with the document date, custodian, and proposition it proves. A procedure manual may show the company method; a revision history may connect the employee to its development; a receiving-site plan may show why the method is needed. Redact only after preserving enough context to make the material intelligible. The decision is whether the evidence tells a verifiable story without revealing unnecessary commercial detail. Hypothetical example: a seed-testing laboratory specialist gathers archived validation logs after a software migration, because later summary letters cannot show when the internal assay method was created.