Lot Size "WB - Weekly Lot Size"

[Former Member]

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

[csaba_szommer]

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

[Former Member]

Thanks, My problem got solved.Thanks to all for valuable inputs.

Regards,

[JL23]

The system sets the availability date for period lot-sizing procedures to the first requirements date of the period.

In the standard system, the availability date for period lot-sizing procedures is set to the first requirements date of the period. From this date, the system subtracts the goods receipt processing time to calculate the delivery date or order finish date for the procurement proposal. The requirements that lie between the period start and end are grouped together into a lot.

You define the availability date for period lot-sizing with the Scheduling indicator in Customizing.

If the setting has been made in Customizing for the availability date to be at the beginning or end of the period, the basic dates of the planned order are rescheduled as well as the dependent requirements for the components.

[Former Member]

HI Jurgen,

Thanks for the reply .

How can we check the availability date for period lot-sizing with the Scheduling indicator in Customizing.

Please can you suggest the path or T.code to get this.

Regards,

Nagaraj S

[JL23]

follow the instruction given by Csaba

[Former Member]

Please can anyone help!!!

Edited by: Nagaraj S on Aug 5, 2010 11:50 AM