How to Avoid MRP Requirements in the Past

Hello,

I'm a BI guy so please excuse my lack of understanding on how this is handled in ECC. For some time now we've been extracting MRP data into BI for the current day going forward into the planning horizon. Recently it was noted that requirements generated for subcontracted materials were not being transferred to BI. The reason for this is while the requirement for the assembly is in the future, due to lead times in the subassemblies the requirements for the subcontracted subassembly are appearing in the past and thus not being transferred to BI.

Is it normal practice for requirements to be generated in the past? Is there a way to lump all past due requirements on the current calendar day that way these requirements will be transferred to BI. Any input you can provide would be much appreciated.

Thanks,

Ashok