on 04-03-2008 8:14 AM
what does MRP and lot size mean exactly . explain in detail
dear manjeet
plz go through this link ,
http://help.sap.com/saphelp_45b/helpdata/en/7d/c2821c454011d182b40000e829fbfe/frameset.htm
if you are new to this topic , this will help you a lot..
reward points if helpful
regards
ravikant dewangan
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MRP:-
With its accurate and up-to-date inventory management application and ordering
system, SAP R/3 System Materials Management can provide you with the ideal
foundation for precise material requirements planning (MRP).
The main function of MRP is to monitor stocks and automatically generate order Net Change Planning
proposals for the purchasing department. This is achieved by implementing
various requirements planning methods.
The planning run is usually done at the end of the day using the net change
planning procedure. This procedure only plans those materials whose stock or
requirements situation have undergone a change relevant to the planning run and
which have been flagged with the appropriate indicator in the planning file.
A relatively short runtime enables the MRP controller to repeat the net change
planning procedure in short intervals. The runtime can be shortened even further
by defining a planning horizon. This means that the MRP controller always has
current planning results at his disposal. Information concerning important parts
and exceptional situations are automatically generated by the system which means
that the MRP controller is also relieved of routine monitoring procedures. To
improve performance even more, you can use parallel processing functions.
During a planning run, the system performs the following steps: Processing Steps
q Calculates net requirements
q Calculates lot size
q Scheduling
q Creates purchase order proposals
q Creates exception messages
The MRP list automatically created by the system can be adapted by the MRP
controller using interactive planning. Individual materials can be planned again
online immediately.
Since MRP is always performed at plant level, all stock that is available in the Planning at Plant Level
plant is included in the planning run.
Storage location MRP enables you to exclude stock in individual storage locations Storage Location MRP
from the planning run at plant level or you can plan this stock separately at
storage location level. Stock that is planned separately is not included in planning
at plant level.
The planning procedures of consumption-based planning are simple and easy-touse.
Therefore, they are used in companies without in-house production or in
production plants for planning B- and C-parts and operating supplies.
MRP without a BOM explosion is also available as a special function in the MM MRP
System. In contrast to the consumption-based planning procedure, this function
operates using existing sales orders and material reservations.
You can determine which MRP procedure should be used for each material and
plant. Naturally, materials can also be excluded from automatic requirements
planning.
Lot-Size:-
Key that determines which lot-sizing procedure the system uses within
materials planning to calculate the quantity to be procured or produced
A procedure in material requirements planning used to ca
and production quantities (lot sizes).
Lot-sizing procedures are divided into the following gro
o Static
o Period
o Optimum
Production Planning and Detailed Scheduling (SCM-APO-PPS
Procedure in production planning that is used to calcula
order quantities of receipts.
o In the SAP APO (Advanced Planner and Optimizer), the
standard lot-sizing procedures are available, which
configured in the location product master.
o Exact lot size
o Fixed lot size
o Period lot size
o Reorder point procedure
For further lot-sizing procedures there are special heur
available, e.g.
o Groff lot-sizing procedure
o Reorder point planning
Reward points if helpful,
Regards,
Archit
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