The BPCS function is exactly opposite to your understanding. This is a
common misunderstanding because of how SSA (nor Infor) chose to pose the

A Single Issue is where a specific Item/Whse/Lot/Location is specified for
issue. That is, I tell BPCS exactly what I want to issue rather than
allowing Backflushing to suggest something. So, the question "Must Single
Issue" means "is a Single Issue required".

If you say "Y", they you are saying that the Item must be single issued.
That is, it is not eligible for Backflush. It will be skipped in the
Backflushing process and you will have to post a Single Issue in order to
consume it on a S.O.

If the setting is "N", then you indicate that the Item does not need to be
single issued. That is, it is eligible for Backflush.

The Must Single Issue value in the Item Master will be used as the default
on the BOM. And, it is the value on the BOM that will be carried to the
Shop Order Material Allocation (FMA) File. It is the FMA value that will
control whether the Component will backflush.

I hope that my explanation clarifies the function of Must Single Issue.

Please feel free to contact me offline if you have some additional


Les Mittman


BPCS Consultant with over 20 years experience

-----Original Message-----
[] On Behalf Of
Larenzo Alexander
Sent: Tuesday, October 27, 2009 3:46 PM
To: BPCS Forum Post
Subject: [BPCS-L] Controlling Backlushing

What settings in BPCS controll if items backflush or not. I thought I
understood but apparently I dont.

I thought that if an Item's "Must Single Issue" Flag in the Item Master and
the BOM is set to "N" at the time that the Parent's Shop Order is created,
then the item will not backflush?

If any one can help me understand what I'm missing it would be greatly


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