Coverage profile and fx lot size.

Dear All
I have a material with coverage profile (MRP2 view)
I have an issue during MRP run in MD03 with this material.
IN material there are folowing parameters
MRP type : PD
Lot size : FX
Fixed lot size : 24
So, In MD03 I get the following:
Per./segmt     PldIndReqs     Requirements      Receipts     Avail. quantity      ATP quantity      Actl cov.     Stat. cov.     Daily reqs      Trget cvge      MaxCv     Min.covge      Target stck Minimum stock     Maximum stock
30.10.2011     0     -10,421      0     120,457      0      14     11,6     10,421      17      20     9      177,157     93,789     208,42
31.10.2011     0     -10,421      0     110,036      0      13     10,6     10,421      17      20     9      177,157     93,789     208,42
01.11.2011     0     -8,445      0     101,591      0      12     12,4     8,164      17      20     9      138,788     73,476     163,28
02.11.2011     0     -8,445      0     93,146      0      11     11,4     8,164      17      20     9      138,788     73,476     163,28
03.11.2011     0     -8,445      0     84,701      0      10     10,4     8,164      17      20     9      138,788     73,476     163,28
04.11.2011     0     -8,445      72     148,256      0      18,6     18,2     8,164      17      20     9      138,788     73,476     163,28
05.11.2011     0     -8,445      0     139,811      0      17,6     17,1     8,164      17      20     9      138,788     73,476     163,28
06.11.2011     0     -8,445      0     131,366      0      16,6     16,1     8,164      17      20     9      138,788     73,476     163,28
07.11.2011     0     -8,445      0     122,921      0      15,6     15,1     8,164      17      20     9      138,788     73,476     163,28
08.11.2011     0     -8,445      0     114,476      0      14,6     14     8,164      17      20     9      138,788     73,476     163,28
Link: [imageshack.us/photo/my-images/33/35632293.jpg]
<a href="http://imageshack.us/photo/my-images/33/35632293.jpg/">[IMG]http://img33.imageshack.us/img33/7832/35632293.jpg[/IMG]</a>
MD03 generated purchase requisition on 04.11.2011 for 72 pcs.
As you can see the available quantity of material on 04.04.11 will be 84,701 - 8,445 = 76,256. That is more than Minimum stock( 73,476)
Can you suggest why system creates purchase requisitions on 04.11.2011 but not on 05.11.2011
I can only assume that it's a one more feature of MRP. It calculates dates and quantitys to be procured as lot size EX was set in material master record and doesn't take into account increasing of stock due to FX lot size.
P.S. When I clear coverage profile in material master , SAP generates pur.requisitions correctly.

OK, now it is more clear.
First you should know that only target is doing a real impact. Min and Max are just for display.
Since you have period as month, looking at it on daily resolution is not relevant, you should look at months. You can also see on your daily display that target stock level will only change at month turn.
Hope that it makes it now easier for you to understand the system's calculation.

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By default, the lot size works as lot-for-lot quantity in the make-to-order and project scenario.
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Dear
Coverage Profile and Forecast profile are two different subject !
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http://help.sap.com/saphelp_47x200/helpdata/en/f3/dbbb16b36111d1a6770000e83235d4/frameset.htm
https://wiki.sdn.sap.com/wiki/display/ERPLO/Dynamicsafetystock+calculation
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Profiles
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I have question regarding coverage profile configuration.
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Thank you very much.

Dear
Coverage Profile and Forecast profile are two different subject !
If it is range of coverage profile , then The range of coverage profile contains the parameters for calculating the dynamic safety stock. This is a statistical calculation on the basis of average daily requirements.With the dynamic safety stock, you can determine a safety stock based on requirements and range of coverage. The dynamic safety stock adapts automatically to the changed requirements and is fully available for planning purposes. You can limit the quantities used in the calculation of the dynamic safety stock by defining maximum and minimum ranges of coverage. You can also limit the period of time by defining different time periods in which the range of coverage is valid.
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http://help.sap.com/saphelp_47x200/helpdata/en/f3/dbbb16b36111d1a6770000e83235d4/frameset.htm
https://wiki.sdn.sap.com/wiki/display/ERPLO/Dynamicsafetystock+calculation
Where as Forecasting Profile , please refer the below :
Profiles
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I think you should use Forecast Base MRP type like VV rather PD.PD does not carry out any Forcasting Functionality .Please check wether you replicate PD from VV , then it is possible to execute Forecast specially Total Consumption set up in MRP type .
Hope this will be useful
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JH

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Hai All,
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check with the table MARC and the fileds BSTMI (Minimum lot size ) BSTMA ( Maximum lot size )
for more info
Re: Table for Lot size.......
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MRP--> Planning-> MRP Calculation---->Define range of coverage profile.
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Req for 2nd week: 1000
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Dear all
I have scenario as follows:
1. My supplier's standard packing size of a raw material is 1000 EA.
2. I want to follow period based lot size to optimise my order and inventory cost. But I don't want to use dynamic lot size which will propose dynamic quantity.
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Hi
1.As you are looking for Weekly demand demand quanityt , you have to assign Weekly Lot Size : WB.
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99301 03991

Used for claculate the procurement qty during MRP and depends on the lot size procedure you select. quota arrangement also uses this lot size.
[http://help.sap.com/saphelp_erp60_sp/helpdata/en/f4/7d26ad44af11d182b40000e829fbfe/content.htm]
Edited by: Karthik on Jul 8, 2011 9:47 PM

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I would like to suggest as :
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Dear senior,
My client has the following scenario. His supplier provides the item in a fixed lot size of 100. The minimum lot size to be ordered is 300.
The supplier is a fixed vendor.
I tried to maintain this information in the Material Master MRP views. Lot size - FX, Fixed lot size - 100, Minimum lot size - 300.
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Hi,
Fixed lot size - 100 means for every 100 quantity system will create one purchase document.
If you selected Lot size - FX - Fixed order quantity , then no need to maintain Minimum lot size & Maximum lot size fields.
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Lot size = FX
Fixed lot size = 100
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If Lot size is Ex - Lot-for-lot order quantity, then only need to maintain Minimum lot size & Maximum lot size fields in the MRP 1 view.
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Minimum lot size = 60
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That's why, in your case system is reseting Minimum lot size every time.
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Regards
KRK

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Prashant

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No, system will not consider the size that maintained in the production version for the creation of planned order while the mrp run .
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1. please explain about lot size and replenishment lead time.
2. please also explain about consumption based planing and in steps explain how to perform manual and automatic reorder point(transc code please)

You use the lot-sizing procedure to determine how the system is to calculate the reorder quantity in the planning run.
A lot size defining the lot-sizing procedure is assigned to every material master record applicable to materials planning.
The lot size is defined in Customizing by the combination of the lot-sizing procedure and the lot-sizing indicator.
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o period lot-sizing procedures
o optimizing lot-sizing procedures
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The following parameters are also available for controlling the lot-sizing procedure:
o Short-term and long-term lot size
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You define the periods in the section of the screen entitled "End of the short-term period/start of the long-term period".
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For materials that are planned using the short and long-term lot size,
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   with the long-term lot size move into the short-term period because no
   changes relevant to MRP have occurred for the material.
   You define the maximum MRP period in the step, "Define maximum MRP
   period". A material that is planned on a regular basis should also be
   provided with an MRP type that contains the indicator for regular MRP.
o Scheduling indicator
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o is to be set to the first requirements date in the period
o or is to be set to the beginning of the period
o is to be set to the end of the period
o or whether the period start represents the beginning of the planned
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manufacturing)
Interpretation of the delivery times
For the lot-sizing procedure, you can also define whether the period
start is to be interpreted as the delivery date or as the availability
date using the indicator, "interpretation of the calendar times".
NOTE
The indicators, Scheduling and Interpr.deliv.times are mutually
exclusive.
Indicator for the splitting quota
For the quota arrangements, you can determine whether the requirements
quantities are to be distributed to several items, that is, whether
they are to be split. With the splitting quota arrangement,
requirement quantities are not simply allocated to the smallest quota
rating. Instead, they are distributed among various sources using the
following formula:
Quantity for source of supply X = Quota of source X * reqmts quantity
Sum of all quotas
Overlapping indicator
The overlapping indicator along with the cycle time in the material
master record are used to split the planned orders into several
partial quantities whereby the in-house production time overlaps by
the cycle time.
Lot-sizing procedure for make-to-order production
In make-to-order production, you can use the indicator, Lot size for
make-to-order production to determine whether,
the order quantity is to be calculated using the exact lot size
the order quantity is to be calculated using the exact lot size and
the system is also to take the rounding quantity or the minimum and
maximum lot size into account
the order quantity is to be calculated using the lot-sizing procedure
defined for the short-term area
Maximum stock level variant
The system only displays the Maximum stock level variant field in the
lot-sizing procedure, Replenishing to maximum stock level. The
indicator only has an effect in connection with reorder point planning
taking external requirements into account and in connection with
material requirements planning and controls how the system calculates
lot sizes.

Coverage profile and fx lot size.

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