Hi Ying,
As I recall we changed it so the PDSs had different modes.
But we had some problems with this heuristic in getting it to work consistently across different data and with long GR days.
In addition we had seen that there is room for improvement in regards of master data in the system and the actual process of deciding which resource to use. So, at the moment, we are doing the reallocation of orders manually. There are actually a lot of "hidden" rules involved in the process that have to evaluated.
We aim to revisit this heuristic in the future...
Best of luck,
Hrvoje