Have you ever had a moment where you realised why a colleague is having performance related issue? Recently a colleague asked me to QA some analysis they'd done in excel.
They'd done it all wrong, and not checked things through. Told them to fix it, they did it and it still wasn't perfect. One thing they'd done completely wrong and wasn't in line AT ALL with the entire project we'd done and I had no idea why they were doing it that way. It was like they'd not been involved in the project at all and were doing something else.
At this exact moment I realised why were on a Performance Improvement Plan. It finally made sense to me.