If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

What task have you tried since training?
Where did you need additional help?
What follow-up resource would help?

Author notes / illustrative keys where applicable:
1. Use this answer to locate the part of the experience that needs explanation. The example issue to investigate is: learners cannot reproduce a task without the trainer.
2. Additional help needs locate the step where classroom guidance stopped supporting practical application. Offer an appropriate reference or support route, while separating a learning gap from constraints in the working environment.
3. Turn the requested improvement into a testable next step. One illustrative action is: provide a short task walkthrough.