Lot size calculation

Helllo,
We would like to use the Wilsons formula for calculating the optimal lot sizes. This is not possible with the lot sizing procedures SAP provides.
Is there a way that I can create my own formula for calculating the optimum lot sizes?
Kind regards,
Rudy

Hi,
You can develop a period lot sizing procedure which has a larger period length than the planning horizon. For example, if the planning horizon is 999 days, develop a procedure for 36 months. You can copy the standart lot sizing procedure TB and change the period type and number of the periods. This way all planned orders that would be generated in that period will be combined into one.
Regards.

Similar Messages

Lot size calculation for Purchase order

Hi all,
I want to purchase Labels which comes in lot qty such as in lot of 100,200 etc.
For that particular items i want to do mandatory qty lot size in PO when buyers places the purchase order.
Can anybody tell me How i can map that lot size for the particular item.
Regards,
Anant

Hi,
You can done it with change Material Master.
Enter MM02 t-code, enter your material code and select MRP1 view.
Here maintain Rounding value as 100 in material master.
After when your create purchase order system put quantity as 100, 200, 300 etc.
Regards,
Mahesh R.

Weekly lot size calculation with scheduling lines

Hi,
We are using WB = weekly lot size calcultaion for purcahsed material.
We are also using Scheduling agreement and MRP is creating schedule lines automatically, but it does not take into account the weekly lot size.
If we have three different requirements coming from different end products for same week, but different date and then we run the MRP, SAP will create three different schedule lines for the same date. Is it possible to configure system so, that it will create one schedule line in that case?
Regards,
jaana

Hi,
We are using rounding profile and minimun lot size from the Quota arrangement. Roundings seems to work fine.
Which plant parameters you mean, I have check the MRP plant parameters, bur is there some point which will effect for the gouping?
Thanks and regards,
jaana

Lot size creation in PP

Hi gurus,
I have 2 scenarios,
1. PIR of a product X is 56 & lot size is 10. After running MRP, SAP should create 6 plan orders of qty 10.
2. PIR of a product X is 54 & lot size is 10. After running MRP, SAP should create 5 plan orders of qty 10.
Means,
Balance qty after lot size calculation, should be round off to the next lot size if it is greater than 50% of lot size.
Similarly Qtyshould be round off to the previous lot size if it is less than 50% of lot size.
Pls help
Regards,
SamieR

Dear Samie,
Case1: As explained by our other forum member you use a fixed lot size and mention the lot size quantity as 10 and the system
will create 6 different planned orders.
Now for case2: the only possible solution will be create a copy of fixed lot size and include the check box for last lot exact in
OMI4 for this particular lot size,so that the system create 5 planned orders for 10 quantity each by mentioning the fixed lot size
quantity as 10 and the last planned order alone will be for 4 quantity.
Check and revert back.
Regards
Mangalraj.S

Rounding Value is not considered for MB lot size

Hi
I have a scenario where MB (Monthly Lot size) lot size is used with rounding value. Example as below:
Lot size: MB
Min Lot size: 15000
Rounding Value: 20000
DEMAND: 16000
When MRP run, System is creating the 16000 as P Req instead of 20000 which is the rounding value.
Pl let me know, if I need to apply OSS note / any other solution for this.
Thanks,
JK
Edited by: Janakiram Katakam on May 17, 2010 4:57 AM

Dear ,
Are you using any Rouding Profile in MRP1 view ?
What is the Setup in OMI4 for MB-Lot Size .Remove the tick mark in Last Lot Exat if it is marked .By specifing the rounding value, the system will determine during lot size calculation that lot size qty is a multiple of of an order unit(eg : pallet size if mtrl is delivered in entire pallets...).
Please check what is the Lot Size Indicator or Lot size procedure assinged to it ?
2.you can use rounding profiles...its used to define the setting of rounding up or rounding down the order proposal qty into deliverable quantities...rounding profile maintenance the t-code is OWD1. Here for static rounding profile
Rounding profiles are defined under:
spro-> purchasing->consumption based planning->planning->lot size calculation ->maintain rounding profiles...
it consist of threshold value and rounding value...
the threshold val is the value from which the system rounds the value of the next deliverable units upto...
the rounding value is from which the systemshd round up to as soon as threshold value is exceeded...
Otherwise , Check FM MD_ROUNDING_VALUE
Regards
JH
Regards
JH

Maximium lot size is 200 in MRP1 view.I have purchase order which 400 qty

Maximium lot size is 200 in MRP1 view.I have purchase order which 400 qty , but my system is allowing to pick 400 qty, can you please say wat may be the reason
regards
sakthi

Hello,
As others others experts are saying your maximum lot size will only work for MRP run not for manual created PR.
The system takes this value into account during the automatic lot size calculation for planned orders and production orders. The lot size of the individual orders cannot exceed this value
Regards.
Alok Tiwari

Lot Size "WB - Weekly Lot Size"

Dear All,
I have selected lot size "WB - Weekly Lot Size" for a material.
The Planned week start day is Monday in planned calender.
If i run MRP for the above maintained material it is not flowing the requirment and it is not combined on Monday, it is throing on Tuesday, Thursday and all the other day including MOnday also.
Why is this system is not throwing correctky the requirment on every MOnday.
Is there settings need be done to get this.
Your valuable answer will be appreciated.
Regards,
Nagaraj S

Please read SAP online help:
http://help.sap.com/erp2005_ehp_04/helpdata/EN/f4/7d282c44af11d182b40000e829fbfe/frameset.htm
Please check your settings in SPRO:
SPRO > Production > MRP > Planning > Lot-Size Calculation > Check Lot-Sizing Procedure
...here you can check "Scheduling" field (V439A-TERBV) of lot size "WB". And you can check also field V439A-LGTER.
F1 help for the field:
Scheduling for period lot sizes in short-term area
This indicator defines the time in the period the system is to create the availability date or the start date for the lot for period lot-sizing procedures.
The availability date is the date on which the material, including the goods receipt processing time, is available again. In the MRP list, the availability date is equal to the MRP date.
In in-house production, the start date is the order start date, in external procurement the start date is the release date.
The following procedures exist:
Availability date equal to requirement date
Availability date at period start
Availability date at period end
Start date at period start
Planned order start date at period start and availability date at period end
With this setting, the in-house processing time in the material master record is ignored.
Note
The following is valid in all cases:
If the start date lies in the past, the system switches to forward scheduling. The following example illustrates how the system procedes:
The period start is Monday and the period end is Friday. The planned delivery time is 8 days. The indicator for determining the date is set to, "availability date at period end".
Today is Monday, a requirement is planned on Wednesday. The system has to schedule forwards. As the system works using date determination, today's date is not selected as the start date. Instead, the system determines the next period end, and uses backward scheduling to calculate a start date that does not lie in the past. This means that the end date was planned for the Friday of next Week.
Edited by: Csaba Szommer on Aug 5, 2010 9:32 AM
Edited by: Csaba Szommer on Aug 5, 2010 9:35 AM

Reorder level/Lot size

Dear All,
For planning plants we have MRP TYPE: VB
Now for Production Plant the requirement is:
1) Reorder level and safety stock(safety stock is maintained in production plant only)
2) MOQ: 300 pcs
3) whenever the stock goes below the reorder level they dnt want to raise a PO of 300 pcs on vendor. When the reqmnt from all plants reached at 200 pcs then only they want to raise PO of 300 pcs
How to do this ?
Regards
Payel

Dear,
Generally, a procurement proposal is generated if the current plant stock minus external requirements and plus fixed receipts falls below the reorder point. The system determines whether the reorder point has a shortfall for an order proposal to be generated at all. The subsequent lot-size calculation is then carried out exclusively on the basis of forecast requirements, that is, as many forecast requirements are grouped together for a lot as belong to a lot size period or as is economically useful. However, forecast requirements are only considered if the "MRP indicator of forecast" is set in the MRP type OMDQ. The generated order proposal is at least so high that it clears the material shortage up to the reorder point.
Also note consumption-based planned materials are not planned within a multi-level single-item planning MD02 you need to run it throuh MD01 or MD03.
Please try and come back.
Regards,
R.Brahmankar

Is it possible to change the Costing Lot size for preference calculation?

Hi Gurus,
Is it possible to change the costing lot size for the preference calculation?
Reason for my question is: We have all prices on price unit 100
and we want to use also the price unit 100 for preference calcalation.
But the preference calculation always take price unit 1.
Is there any possibility to set somewhere the costing lot size for pref.calculation?
Thanks
Regards
Dieter

Does really nobody has a hint?

MRP : Calculating lot size without purchase orders

Hello,
    We have some materials with weekly replenisment.
    We want to calculate the quantity by following the formula : Maximun stock - actual stock.
    The lot size procedure HB do something similar but takes into account the existing fixed receipt elements,
    How can I avoid to take that stock into account? any other characteristic? any user exit ? Any badi?
Thank you

Ander,
Check BADI - MD_CHANGE_MRP_DATA, this may be helpful in achieving your requirement.
Regards,
Prasobh

/SAPAPO/RRP_PLANNING calculation requirements lot size period

Hi all,
In badi: /SAPAPO/RRP_PLANNING Method: AFTER_NETTING I want to recalculate the requirement (QUANTITY in CT_REQ_IO) depending on the period type of the lot size ( SAPAPO/MATLOTSZ-PERVR ).
So feg, requirements for 1 product for 1 day, the period type of the lot size = W week -> so I have to summerize all quantities for that product for 1 week.
Is there a function module to do this? Because you can have week but also month, quater, ...
thanks a lot,
Caroline,

Hi,
Please see the BAdi documentation available also one example class is given from which you can use the code whichever is applicable to your requirement.
Class Name: /SAPAPO/CL_EXM_IM_RRP_PLANNING
Regards,
Saurabh

MRP Type P1 & Lot size PK

Dear All,
This is REM scenario,
Client is going scheduling agreements
material master Settings
MRP Type - P1
Planning time fence - 10
Lot Size - PK
Procurement type - F
GR Processing time - 2 days, No plad delevery time maintained.
in planning calendar we are going with only one day as Friday
and we made previous day is working day if friday is holiday.
After MRP system is proposing dates for schedule lines as
16/06/2010 ( wednesday ) Rescheduling date as 07/06/2010 ( Monday ) ( Rescheduling in i.e 10 )
How system is proposing this dates
Please share your views or if required more info then revert back
i cannot upload Docs as my company policy is not allowing
Regards
Madhu

Hi ,
Bring process forward (reschedule in)
Within this rescheduling horizon, the net requirements calculation checks whether, after a requirement, a firmed receipt exists, which can be used to cover this requirement. Then the system displays a rescheduling date as well as the exception message Bring process forward for this receipt. The net requirements calculation then uses this receipt and the system will only create another procurement proposal if the receipt quantity is not sufficient to cover the complete requirement. Several firmed receipts can be used to cover one requirement.
It does not take in to account the GR processing time and it is purely based on the stock requirement date , parameters in Procurement and Scheduling in the Material Master
So it will consume the requirement backward scheduling and bring the Process forward.
Kumar which strategy are you using ? scheduling agreement is of weekly , daily or monthly bucket ?
How many days SA bring to Production and How many days SA for forecast you are doing ?
Are you using any Program to convert these SA in to PIR and upload ( using any program ) .
Regards,
Jayavimal
Edited by: jaya vimal on Jun 16, 2010 1:33 PM

Finder Folder Size Calculations

When I'm archiving, I have to do a lot of Get Info to calculate the folder sizes for DVD burning. Problem I'm having is the file size calculations start taking forever after working for a few minutes, or they don't calculate at all. Usually works fine when I start but after a minute or so It's like the computer get's tired and just stops. Even if it's a 1mb folder it will have trouble.
Is this normal? Seems really odd that something so incredibly simple can make my archiving process so difficult.
Files reside on a network HD.
Thanks for any help.

I'd create a disk image of appropriate size, mount it, copy items to it until it tells you there's no more room. Then, burn it.

Lot size dependent / independent

Hi, please advise when the system uses this lot size times data in mrp4 view? Where we need to specify that whether lot size dependent or independent need to select? When the system uses this data and when the system uses the planned delivery days and in-house production days which is in mrp2? Pls advise.

Dear,
Planned Delivery Time use for external procurement Like raw materials.
In-house production time use for in house manufacture materials like HELB and FERT.
In-house production time is independent of the order quantity.
Lot size depnendent timing calculate from the routing. It is calculated byadding the lead times of all operations, the float before production, and the float after production.
You schedule the routing for a base qty The in the scheduling results screen click the button" scheduling results"
You will get the results screen in days.
In that screen at the botton there is abutton update material master.
After this go to CA96 There update the material master.
Please refer this link,
Re: set up time dependant and independant of order qty
Regards,
R.Brahmankar

Lot size Key without splitting Quota

Hi,
Can any one explain me what is the use of Lot size Key without splitting Quota.
We had created a lot size Key - XY with following seting:-
1) Lotsize Proceed = P
2) Lotsize indicator -K
3) Scheduling =2
4) No of periods = 1
5) Splitting Quota = Not checked(blank)
If we had configured this lot size key, what is the benefits of the above setting, What testing need to be done to know whether this lot size key is working perfectly after configuration?.
Thanks in advance

Hi,
If splitting quota indicator not set, then qouta arrangement is not used during planning wrt to selected lot size.
Lot size procedure you selected, it is a periodic lot sizing procedure. Here the system groups several requirements within a time interval together to form a lot.
Lot size indicator Determines how the lot size is calculated for a certain lot-sizing procedure during material requirements planning. For your selection system creates lot size by refereing to planning calender defined in the system
Scheduling -
This indicator defines the time in the period the system is to create the availability date or the start date for the lot for period
lot-sizing procedures.
The availability date is the date on which the material, including the goods receipt processing time, is available again. In the MRP list, the availability date is equal to the MRP date.
In in-house production, the start date is the order start date, in external procurement the start date is the release date.
according to your selection - Availability date at period end
No of periods - 1
Run a complete MRP cycel to check whether it is working properly or not.
Post the results what you get.
Regards,
Pavan

Lot size calculation

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