I hate performance reviews. I think they do not achieve what people think they do, they take up a lot of time and effort to decide and perform, and they often have quite a negative effect on the staff member.
I think performance reviews and KPIs for individuals just need to go. Get rid of them. If someone isn't performing, you can manage that without a KPI system. If someone is performing well, you can provide that feedback without a KPI system. We need to start having meaningful conversations, not scoring people.
People, like in this article, seem to double down on them and make them more complex and intricate in an effort to make them effective. They are going in the wrong direction. Just get rid of them altogether.