“The process was confusing” may be true, but a reader cannot yet see the problem. Which instruction conflicted with another? Where did someone stop? A concrete example gives the claim something to stand on.
Ask what happened at one moment
For an invented example, a form asks for a reference number before explaining where to find it. That situation gives “confusing” a specific meaning. The next sentence can explain why the order of information creates difficulty.
Keep the example relevant to the claim. A colourful detail about the office wall will not clarify a problem with the form unless it affects the action.
Separate an illustration from evidence
If you made up the example, label it as hypothetical. If you are describing a real event, use details you can support. Plausibility does not turn invented numbers, dialogue or outcomes into evidence.
Try a three-part paragraph: claim, example, explanation. The final part matters because the reader may not draw the same connection automatically.
Return to the size of the claim
One example may demonstrate a possible problem without proving that it happens everywhere. Narrow broad wording when your evidence covers only a particular situation.
For a final pass, combine this with revision before proofreading. Correct punctuation cannot repair a paragraph whose example supports a different claim from the one at its beginning. Fix that relationship first, then polish the sentence.