APO PPDS, using DS scheduling log
Detailed scheduling log is a good tool for PPDS consultants and developers to understand how liveCache work when it performs detailed scheduling tasks.
The easiest way to use scheduling log is to turn on the log in DS planning board with command SLON1 or SLON2
Then you perform DS tasks (for example: drag & drop), the system will display the schedule log before showing the DS result (or display the schedule log in a separate window)
The schedule log tells us which order/operation/activity are changed during scheduling, it is a very helpful tool to understand liveCache logic.
Technically, this schedule log is just a output parameter of function module /SAPAPO/OM_ACT_SCHEDULE, if you write your own DS heuristic or stand alone program, it is quite easy to turn it on and save the log for trouble shooting.