Planned order - basic scheduling & Production order Lead time scheduling

[Former Member]

Hi,

Lets say I have run MRP for a material with scheduling key 1 (Basic dates scheduling).

the planned order is created considering the in house production time in MRP which is quantity independent and approximate.

But when i convert the planned order to production order and relaease it... the system schedules the order considering the times in routing.

There will obviously be differences betwwen the dates determined earlier thru basic scheduling and the dates determined now from the routing and this may lead to extension of the delivery date. How does SAP accomodate this?.

regards,

Ashok

[Dsk]

Hi,

If you are having routing then you are supposed to use the 2 lead time scheduling so that the required materials are planned properly...

[rupesh_brahmankar3]

Dear,

1.You can calculate the lead time by running the MRP with scheduling parameter = 2, here system will do lead time scheduling, You can check the result of the lead time scheduling in the planned order.

2. When creating production order also lead time scheduling is carried out.

Lead time indicates the time required to produce material. to calculate lead time system use following ,

A. standard values of the operation from the routing

B. floats values from scheduling margin Key.

Production order scheduling , in that case system will not consider the In-house production time. Because lead time scheduling is carried in production order.

Scheduling will be done for routing times not for In-house production time.

During the lead time scheduling the exact production dates are calculated.

Also refer this help link

http://help.sap.com/saphelp_erp2004/helpdata/en/f4/7d3f9344af11d182b40000e829fbfe/frameset.htm

Hope clear to you.

Regards,

R.Brahmankar

[Former Member]

Thanks Mr.Brahmankar.

I guess i was not clear in my query.

If we use sheduling key 2 (LT scheduling), then there is no issue at all.

But, If we use Basic scheduling in MRP, Plnd order is created with the In house prodn time in MRP2 view right?.

Now there are 2 problems here. please correct me if I am wrong.

1. The In house prodn time in MRP2 view is qty independent. say the time is 2 days. Irrespective of planned order qty it takes only 2 days as the production time.

2. this time is an approximation and routing may have a different time.

So when the production that is created from the above planned order is released will it not create a conflict because the earlier dates determined (thru basic scheduling) are not appropriate now?.

If only scheduilng key 2 is to be used for MRP run, what is the need for Basic scheduling option in MRP?

regards,

Ashok

[rupesh_brahmankar3]

Dear,

Tell me why do you want to use the Basic date scheduling in MRP?

Yes you are right In house time in material master MRP view is lot size independent.

If you want exact MRP scheduling with lot size dependent time then go to CA02-- Extra-SchedulingSchedule the routing and then click on scheduling result and mark update material master. Then update the material master through CA96. You will get the lot size dependent time in work scheduling view then run MRP and check your result.

Hope clear to you.

Regards,

R.Brahmankar

[Former Member]

Hi Mr.Brhmankar,

Thanks again. I am trying to understand the need for Basic scheduling. When is it used?

It will always create a conflict when the prodn order is scheduled w.r.t routing, right?.

How do we handle this?.

Rgds,

Ashok

[rupesh_brahmankar3]

Dear,

If you want to do the scheduling but don't want to calculate the capacity then we use the Basis date scheduling.

Yes right the production order scheduling is with respective to routing timing.

Please refer this link for details,

Regards,

R.Brahmankar