Redmine

We've started using Due Date as a way of determining priority and scheduling work within the team.

While Priority and Due Date work independently though, the onus is on the team to constantly update the priority as the due date approaches.

It would be good to be able to automate priority increases though I'm aware these formulas would need to be tied to each value in the enum.
Calculation capabilities based on est effort / time spent / % Done might also be useful.