An Ishikawa diagram for one stubborn problem: causes sorted along bones like people, process, tools, environment. Structured root-cause hunting for recurring issues.
Agree the problem statement; write it at the fish's head.
Pick 4–6 cause categories: people, process, tools, environment…
Fill each bone with candidate causes; ask 'why' to go deeper.
Vote the most likely causes; test them against evidence from the sprint.
Agree countermeasures for the top verified causes, with owners.