Choose fields that answer operational questions
A practical order is campaign, channel, placement, concept or variant, and revision. Avoid internal IDs as the only human-readable signal.
Normalize the filename grammar
Use one separator, predictable lowercase words, and a stable revision format. Do not let each design invent its own abbreviation.
Prevent accidental overwrite
Variant and revision labels must produce distinct paths. Export should warn when two requested designs resolve to the same filename.
Ship a manifest with the files
List design name, width, height, filename, and any delivery note. The manifest describes the export; it does not become another document authority.