Hi: We only use Planned Hours. That way, the percent complete is the percent of the work to be performed. If you use Duration, the percent complete is a percent of the time that has passed. Our work is proportional to the work we do, not the time that passes. If we do absolutely nothing on a ten-day-duration task, and three days have elapsed, we don’t say the task is 30% done. We also do not automatically calculate the percent complete. We make people put it in. If we were to use Duration, automatically calculating the percent complete would make sense. Does this help? Thanks, Eric