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Scheduling Dates for Planned Order and Production orders

Former Member
0 Kudos

Hi,

I need some clarifications about scheduling.

I maintained the following details for the Product in MM

GR =1 , Inhouse =1, Planned Deliver=1 and Scheduling Margin Key = 1 + 1+ 1 +1.

and In routing i have 2 operations Operation 10 setup time i have given 30mts and for Operation 20 i didint maintain any standard timings.

I have given requirement on 30.01.2009.

When i run the MRP on Basic Scheduling (MD02 - Scheduling indicator is 1)

Planned Order

Ord Finish 29.01.09

Ord Start 28.01.09

Pla Open 27.01.09

Pro Order (Basic Date)

Basic St 28.01.09

Basic Fi 29.01.09

Production Order Sch

28.01.09 14.20Hrs

28.01.09 15.00Hrs

27.01.09 (Release)

When i run the MRP on Lead Time Scheduling

Planned Order

Ord Finish 29.01.09

Ord Start 26.01.09

Pla Open 23.01.09

Pro Order (Basic Date)

Basic St 26.01.09

Basic Fi 29.01.09

Production Order Sch

27.01.09 13.55Hrs

27.01.09 15.00Hrs

26.01.09 (Release)

Can any one explain the dates how the system has calculated.

Thanks in adavance

Nag

Accepted Solutions (1)

Accepted Solutions (1)

Former Member
0 Kudos

First case:

Scheduling type : Determination of Basic Dates for Planned

The system carries out backward scheduling to determine the basic dates. It starts from the finish date and calculates backwards using the goods receipt processing time and the in-house processing time maintained in the material master and thus calculates the basic start date.

Since GR =1 , Inhouse =1, Planned Deliver=1

Your requirement date = 30.01.2009

GR Required on 29.01.2009 since GR is 1 day hence order Finish date is 29.01.2009

Prod. has to start on 28.01.2009 since Inhouse prod is 1 day hence order start date is 28.01.2009

Since you have mentioned required time at operation, system is showing the same

Production Order Sch

28.01.09 14.20Hrs

28.01.09 15.00Hrs

27.01.09 (Release).

Scheduling type: Lead Time Scheduling and Capacity Planning

In backward scheduling, the system first calculates backwards from the order finish date through the float after production to the production finish date. After this the individual operation dates are calculated backwards, starting from the last operation finish date. The first operation start date gives the start of production.

Since you have mentioned 4 days as floats in Schedule margin key system is taking as

Planned Order

Ord Finish 29.01.09

Ord Start 26.01.09

and

Pro Order (Basic Date)

Basic St 26.01.09

Basic Fi 29.01.09

Please read the following. It is clearly explained in sap help.

Please go thru the below link for 1st Issue:

http://help.sap.com/erp2005_ehp_04/helpdata/EN/8a/a586b04adc11d189740000e8322d00/content.htm

and

http://help.sap.com/erp2005_ehp_04/helpdata/EN/8a/a590a74adc11d189740000e8322d00/content.htm

Please go thru the below link for 2nd Isuue:

http://help.sap.com/erp2005_ehp_04/helpdata/EN/8a/a590b44adc11d189740000e8322d00/content.htm

Regards

Venkat. V

Former Member
0 Kudos

Hi

i didnt understand. Can explain?

Here Scheduling Margin will play a key role on Basic Scheduling or no?

and operation timings i have given only 30mts, But in lead time scheduling it has taken 40mts.

Could you explain

Thanks

Nag

Former Member
0 Kudos

Hi,

In 1st case system will not consider scheduling margin key. It considers GR, In house prod time.

In 2nd case system considers lead times (floats), i.e Schedule margin key.

Now coming to time, please check how you have given formula in scheduling. depends on Operation qty and Base qty.

Please check

Regards

Venkat. V

Answers (0)