Decide where identification belongs
A direct mark becomes part of the component surface. An applied label is a separate item with its own attachment system. Consider whether the component will be replaced, repainted or serviced. If the identifier needs to move with a removable subassembly, place it on the item whose history it represents rather than simply choosing the easiest accessible surface.
Consider change and replacement
A permanent identifier is useful only while its information remains correct. Keep stable identity, such as an asset number, separate from information likely to change. Maintenance intervals or software versions may belong in a record linked to the identifier. Document how an incorrect or damaged mark will be handled rather than assuming it can always be removed cleanly.
Compare the whole identification process
For labels, review attachment and environmental requirements with the label supplier. For direct marking, review the material, finish and permitted surface changes. Both options require legible content, controlled data and an inspection plan. A sensible comparison includes preparation, application, replacement and record maintenance rather than only the price of the mark.