Scheduling the orders in APB using shop order pegged materials with multilevel product structures

Regarding the Advanced planning board, APB is not a material planning engine, but a production scheduling tool.  But APB considers material availability with the parameters set accordingly. That means on hand stock or supply orders should be available for always finite material to be scheduled. Even available, APB will schedule the Shop orders as it finds them on the database, and it will not sequence the shop orders according to the product structure or the manual pegging.

If the business scenario demands material scheduling, supplies has to be planned by MRP. MRP will consider product structure levels when it runs MRP low level coding calculation.  So, in this scenario, first you need to get the supply sub-assemblies in order which could be done by running MRP. And then plan the material using action messages on MRP. Then you could use APB to align the schedule accordingly.

When you set the need date/ earliest start date for all shop orders in one specific day, APB will fetch the shop orders as it queries the orders from the database, regardless of the pegging or the product structure. And as per the Work center resource availability shop orders will be scheduled. Also, when Dispatch rule is set as none, sorting orders into any order is not applicable. Using Dynamic order processing (DOP), might be helpful with this situation.

for always finite material to be available for scheduling, it should have ON HAND STOCK or OPEN SUPPLY ARRIVING before a certain date. After that date, the operations could be scheduled. Else they will become unscheduled.