Schedule with dependent lot size problem

Hi,
    I maintain the setup/process/tear down time(base qty is 10) in Work Schedule view in MM02(dependent with lot size)..But the begin date/end date in these POs are the same when I create Production Orders with different qty.
    It seems my setting doesn't take effect..Do you have any suggestion?
PO 1:   100 qty      Start date 11/10 End DAte 11/11
PO 2:    1 Qty      Start date 11/10 End DAte 11/11
PO 3:1000000 Qty Start date 11/10 End DAte 11/11
Why the start/end date doesn't change based on my PO qty?thanks..

Hi,
Monst Yang wrote:
> I maintain the setup/process/tear down time(base qty is 10) in Work Schedule view in MM02(dependent with lot size)..But the begin date/end date in these POs are the same when I create Production Orders with different qty.
In-house production time (lot size dependent or independent) is used for calculating the basic dates of planned orders when MRP is run with basic dates parameter (instead of lead time scheduling). However when production orders are created basic dates are always determined according to the production dates and production dates are determined by lead time scheduling. In other words, the lot size dependent production time data that you have maintained could only determine basic dates of planned orders, only if MRP is run with that parameter. In the case of your production orders, standart values of the operations and formulas of the work centers are used by lead time scheduling. Dates might be equal because scheduling formulas of work centers does not consider order quantities or labour hours, which would be multiplied by order quantities, are not maintained in routings. Investgate the production dates and scheduling of the operations in production orders. Also have MRP create planned orders to see the effects of lot size dependent times in master data. Be sure to emty the lot size independent production time in material master to avoid it overwriting lot size dependent time.
Regards.
Edited by: Özgen Canan on Nov 10, 2011 3:58 PM

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Hi all,
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Edited by: Jagannathan Saravanan on Feb 28, 2008 10:21 AM

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How to make lot size dependent in Material master?

Hello Experts,
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Where is the Usage for BOM first specified? Is it in material Master or when creating a BOM?
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Message was edited by: Visu Venkat

Hi Visu
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MRP net requirement calcualtion for Lot sizes

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Hi Chris
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Takt time
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Use
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BR
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I have selected lot size "WB - Weekly Lot Size" for a material.
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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.
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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.
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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
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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

Schedule with dependent lot size problem

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