How do I turn a duty into an achievement?

Ask yourself "so what?" about the duty until you reach a result, then write the result with the action that caused it.

A simple method:

• Write the duty plainly: "Processed supplier invoices."
• Ask how well, how much or what improved: Were there fewer errors? Was anything faster? Did you fix a problem?
• Add how you did it: a new checklist, a better system, extra checks.
• Rewrite with the action first and the outcome at the end.

Example: "Processed supplier invoices" becomes "Introduced a three-way match check on supplier invoices, catching duplicate bills before payment."

If you cannot find any result, describe the standard you kept, the scale you handled or who relied on your work. That is still more useful than the bare duty.

Then read it aloud and check it is true.