I am referring thread https://archive.sap.com/discussions/thread/2030433, issue raised by Vishal Mumroo.
I didn't understood the solution he got "We found that in the MRP 4 view of the material master, field u201CIndividual/coll.u201D has not been set as 1 or 2. Later we changed this setting as u201C2u201D, then found that for new production orders with same BOM ,the plan cost starts appearing in the report S_ALR_87013532."
What did you changed in MRP view "Individual/coll." changed to 1 and it solved the problem? Now is he started getting plan cost for production order with material cost in report s_alr_87013532? Is actual cost also rolling up in WBS element after booking hours in production order?