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

Which prerequisite was unclear?
What outcome did you expect?
What detail would help select a workshop?

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: people choose a workshop without knowing equipment requirements.
2. Expected outcomes distinguish a misleading workshop description from a session that addressed a different task. Clarify the intended activity and prerequisites; stated expectations do not prove the workshop achieved learning gains.
3. Turn the requested improvement into a testable next step. One illustrative action is: list materials and prerequisites before booking.