Per the Sys/21 documentation, be sure you have your Demand Policy codes
set up with "NO Exclusions".
You can compare forecasts with actual sales orders and use the resulting
demand to control the MPS or MRP processing. The decision on which
policy is set, should be made once it has been established whether the
item is Master Scheduled (MPS) or under the control of the MRP.
The method used to calculate forecast demand is controlled by the
Consume Forecast flag in the Company Profile, and affects those policies
which utilize internal or external forecasts.
Note: Any MPS and/or MRP recognized demand which is excluded from the
MRP/MPS plan because it offends a demand policy as set here, is
identified on the MRP and MPS review inquiries by inclusion of an X in
the associated supply status code. E.g. status XS reflects an excluded
You can enter the following options:
0 - Total Actual Demand (No F/C). No Forecasts. The module prevents
forecasts being entered and the demand is the sum of sales orders and
1 - F/C Vs Independent Demand. Demand is the greater of forecast or
2 - F/C Vs Total Demand. Demand is the greater of forecast or sales plus
3 - Independent Vs Dependent Demand. Demand is the greater of sales or
dependent demand (forecasts may not be entered).
4 - Explode F/C To Inputs. The resulting demand for the inputs depends
on the demand policy of the component. No demand would result for the
5 - Make To Forecast. Demand is always the forecast entered.
6 - Forecast + Actual Demand. This is total demand. Demand is the total
of forecast, sales and independent demand.
This Demand Policy must be already set up in major type MPFF. For more
information see Maintain Parameters.
Note: If this item exists in another production location, you can set up
different definitions for it using the override facility. For more
information see the Demand Policy field in the fifth Maintain Item
[mailto:system21-bounces@xxxxxxxxxxxx] On Behalf Of Jim Kerr
Sent: Friday, February 29, 2008 6:55 PM
To: 'System 21 Users'
Subject: [SYSTEM21] What program/file triggers a refresh of MPS ?
Does anybody know what function causes a refresh of MPS from Forecast?
example, if the user maintains a forecast item using option 13 on menu
(programs MF110 and MF114) the next time the MPS job is run, the change
the forecast is reflected in the MPS demand. However, if someone was to
the forecast file record for an item (MSP75) any change made to
for the item are not reflected in the MPS demand for the item after an
Program MPF114 (F/cast maintenace) makes reference to program DB550
thought set some kind of trigger in the forecast but I don't see it
called when I maintain an item forecast. So where else does MPS get its
instructions to recalculate demand if a change to the forecast has been
I am trying to force MRP to perform a recalculation of MRP demand after
have made a mass update to the F/cast file (MSP75) and it is not playing
nice which is forcing me to maintain the f/cast using option 13 on menu
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