We currently run a Regen on the weekends and a Net Change during the week.
This is because of the needed processing time to do a Regen. It currently
take 7 ½ to 8 hours to run a full MRP Regen on our system (8.03.403d).
A Regen will look at every part in the system that has MRP checked. The
first process in a full Regen is to delete all unfirmed jobs, new and
changed PO suggestions. It then processes based on the BOM level, starting
with level zero. MRP will also run generate PO suggestions for purchased
parts as a part of its processing, i.e. there is no need to run MRP and PO
Suggestions as separate processes; simply run MRP.
A Net change will only look at parts that have had a change in the demand or
a change in any of the MRP parameters in the Part Plant record since the
last Regen. However, a Net Change will not pick up any changes to the Buyer
Id, i.e. it will retain the buyer that the part had when the Regen was run.
As it finds a part that needs re-processing it will delete any unfirm jobs
associated with the part and then recreate them. This is all easily
verifiable if you run a Net Change immediately after running a Regen. You
can also see how changing the MRP parameters will affect MRP if you make a
change to the part and then run a Net Change. This works well in a test
database where the demand is not changing.
There is a process that can be run (MRPRecalcNeeded) before a Net Change to
aid MRP in seeing the changes to demand that it would normally miss. See
the help for a brief explanation. If you are running MRP for very short
cutoff dates I can see where this might be useful. It is not for us since
we run MRP 7 months out.
Hope this helps,
_____
From: vantage@yahoogroups.com [mailto:vantage@yahoogroups.com] On Behalf Of
gailr999
Sent: Wednesday, May 07, 2008 11:13 AM
To: vantage@yahoogroups.com
Subject: [Vantage] MRP - Regen vs Net Change
How often do you need to run the Regen MRP/Scheduling Utility vs
running the Net Change MRP/Scheduling Utility?
Does anyone know the difference in what the net change does not do that
the Regen does?
Thanks
[Non-text portions of this message have been removed]
This is because of the needed processing time to do a Regen. It currently
take 7 ½ to 8 hours to run a full MRP Regen on our system (8.03.403d).
A Regen will look at every part in the system that has MRP checked. The
first process in a full Regen is to delete all unfirmed jobs, new and
changed PO suggestions. It then processes based on the BOM level, starting
with level zero. MRP will also run generate PO suggestions for purchased
parts as a part of its processing, i.e. there is no need to run MRP and PO
Suggestions as separate processes; simply run MRP.
A Net change will only look at parts that have had a change in the demand or
a change in any of the MRP parameters in the Part Plant record since the
last Regen. However, a Net Change will not pick up any changes to the Buyer
Id, i.e. it will retain the buyer that the part had when the Regen was run.
As it finds a part that needs re-processing it will delete any unfirm jobs
associated with the part and then recreate them. This is all easily
verifiable if you run a Net Change immediately after running a Regen. You
can also see how changing the MRP parameters will affect MRP if you make a
change to the part and then run a Net Change. This works well in a test
database where the demand is not changing.
There is a process that can be run (MRPRecalcNeeded) before a Net Change to
aid MRP in seeing the changes to demand that it would normally miss. See
the help for a brief explanation. If you are running MRP for very short
cutoff dates I can see where this might be useful. It is not for us since
we run MRP 7 months out.
Hope this helps,
_____
From: vantage@yahoogroups.com [mailto:vantage@yahoogroups.com] On Behalf Of
gailr999
Sent: Wednesday, May 07, 2008 11:13 AM
To: vantage@yahoogroups.com
Subject: [Vantage] MRP - Regen vs Net Change
How often do you need to run the Regen MRP/Scheduling Utility vs
running the Net Change MRP/Scheduling Utility?
Does anyone know the difference in what the net change does not do that
the Regen does?
Thanks
[Non-text portions of this message have been removed]