Setting Personal KPIs

"Every Sunday, I look at my todo list from the past week and give myself a grade. I email myself the grade and a brief write-up." -- OP, what are the heuristics/algorithm you use to convert completed tasks into a grade?

I ask because we are capturing a lot of data about what tasks people are completing daily, how long they worked on it, what times of day things are being completed and starting to think about scoring and providing retrospective data on that inside of Sunsama. As an example here's what my calendar looks like when I check stuff off and make commits: https://www.dropbox.com/s/zfgh5udbljii74f/sunsama-tasks-and-...

It's too bad the author doesn't once explain what "KPI" means.