MPS/MRP and forecasting.

"Jim Kerr" <JKerr-FaIC0pVkSM6w7v2zf2itdNJR4SXAr38/@public.gmane.org>
Newsgroups gmane.comp.systems.as400.jbausers
Organization Gleason Corporation
Message-ID <001201c9783b$adf83be0$3201a8c0@DBQ2M441>
This is killing me. JBA V3.5.2

 

We have a F/Cast for a finished good item set up using 13/MPF. Records in
MSP75. The bill of material for the item looks fine, demand policy on the
finished good is 2, i.e. MPFF04 = "2" and so do all the components on
production details. 

 

I run MPS, MRP. I expect to see forecast demand for all the components after
this process but I don't see it for all components. Sometimes I only see
demand for some components if I set the forecast quantity to a much higher
number. 

 

To add to my confusion, I was under the impression that program MR009
performed the "explosion" of inputs for the finished good item but it
doesn't. It will only do that if the demand policy is 4. So where is the
demand for inputs getting created ? Does anybody have a flowchart or
dataflow diagram of what is going on ? Does MRP even create demand for
forecast ?!!

 

 

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