Use when a certain quality or standard is expected, especially in performance or ability. His recent essay wasn't up to scratch compared to his usual work.
Pro Tip 2/3
Negative Feedback
Commonly used to point out something that doesn't meet expected standards. Your cleaning job isn't up to scratch; please redo it.
Pro Tip 3/3
Competence
Emphasizes the adequacy of someone's skills for a task or role. She needs more training to get her skills up to scratch.