Back flushing is nothing but automatic goods issue. System will automatically
posts the goods issue when you confirm the operations.You have no need to make
manual issue. It will reduce the effort.
Backflushing is automatic accounting (Goods issues - 261 mvt) of material
consumed for production, at the time of confirmation. Eg. When a 4 wheeler
automobile is rolled out from assy line, 4 wheels & Tyres are deemed to be
consumed and issued to production order automatically by way of backflushing by
Assy line picks the material from stores/ Assy line and use.
No Physical issue & Manual posting ( Goods Issue) by Stores.
Backflush is used for material which are a must and having fixed
This can be configured in MRP2 Screen,Work centre, Routing and production
Each has some special function.
If you configure this in routing or production order you have no need to
activate this in MRP2 or Work center screen.
MRP2 Screen defines whether material components are backflushed are to be
made at the work center.
When we do the back flush the backlogs are being
created for the BOM components and we are getting the message "Backlogs from
backflush were created or changed" - its just an informative message. Do you
think this has got something to do with the negative postings ?
Backlogs are created due to different reasons.
This message tells that "there is no sufficient stocks
for the bom component/not able to backflush all the material due to plant data
locked etc" at the time of backflushing the BOM Material and hence the
Post-processing list is created that you have to Re-process for stock updation
of each material.
To avoid this you can confirm the following things.
1.Ensure that suffecicient stock is available in the
backflushing locations of each materail.
2.To prevent the generation of "post-processing list" you
can block the BOM from getting backflushed if sufficient stock is not available
in specified location for the BOM COMPONENTS. To do this change the "REM
profile" to "002"in MRP4 view for the BOM MATERIAL.(if the profile is not
available you can crate it through SPRO).
3. To clear the existing Backlog use transcation MF47 and
re-process(be ensure that required stocks is available for each bom component)