DIFFERENCES between BASIC SCHEDULING and LEAD-TIME SCHEDULING.

[Former Member]

Hello SAP Gurus,

Kindly let me know the differences between BASIC SCHEDULING and LEAD-TIME SCHEDULING.

Looking for your early feedback.

Warm regards,

Kaushik.

[rupesh_brahmankar3 · Accepted solution]

Hi,

In house production time in MRP2 view, specifies the time in workdays needed to produce the material in-house. In-house production time is independent of the order quantity.

So when you do the basic scheduling system take the timing from the material master to calculate the scheduling date.While "Basic Scheduling" in MRP... Scheduling margin key is not considered. It takes the "In house production" days for fixing up the start date. This is only exact to "days".

Lead Time scheduling is carried out on request from the scope of MRP. Target dates are calculated from routing and Capacity requirement calculations are also done. The calculations are exact to the seconds (time).

In routing you enter the setup, teardown, processing, and interoperation times it is utilize to calculate scheduling date.

you have to mention on md02 screen that you want lead-time scheduling.

Hope clear to you.

Regards,

R.Brahmankar

[Former Member · Accepted solution]

Mr.Brahmankar,

As you said in house production time is given in terms of days with out reference to order quantity. My doubt here is in house production days will be suppose 2 days for 2 quantities and 1 day for 1 quantity.So do i need to give 1 day or 2 days for in house production days?

Next doubt: If my in house production days are 2 hours for 1 quantity( for example I am in HALB or FERT material master), how will i put 2 hours? that field only takes in terms of days! I cant put decimals.Do i need to go to in work scheduling view and at bottom I need to give base quantity as 48 if I have given 2hours in inhouse production days??

Please reply soon.

Regards,

Mohammad Arif.

[rupesh_brahmankar3 · Accepted solution]

Hi Mohammad Arif ,

By scheduling routings, you can better control the lead times.

Scheduling in routing (CA02 ) as :

Call up the operation overview for the routing.

Choose Extras-- Scheduling -- Schedule.

You reach the Scheduling dialog box.

Maintain the data on the dialog box. The system proposes Backward scheduling for the scheduling type.

Choose Continue.

You reach the Enter overview variant dialog box.

Enter the overview variant you want to use to display the scheduling results. Choose Continue.

The routing is scheduled. You reach the Schedule Overview screen containing the scheduling data.

After the scheduling run has been carried out, click on scheduling Result-- update material master

You use this function to update material master. Go to the CA96 and update material master.

After that run MRP (MD02) check your result.

Regards,

R.Brahmankar

[Former Member · Accepted solution]

Hi Brahmankar,

As I understand you want to say not to maintain in house production days , leave it blank in case of ROH, HALB and FERT in the material master.this data can be taken from Routings??

my scenario is lead time scheduling.

Please confirm.

Regards,

Mohammad Arif.

[Former Member]

Hi,

Basic scheduling :

1.Basic dates are calculated.

2.Exact to day.

3.No cap reqmts are generated.

4.uses the inhouse production time from material master.

5.carried out automatically during planning run.

In basic date calculation ( order start date/ order finish date ) the system always

calculates backward scheduling.

1. From the reqmts date the system subtracts the GR processing time to

calculate the order fininsh date.

2. From the order finish date the system subtracts the inhouse production time to calculate the order start date.

3. From the order start date the system subtracts the opening period given in scheduling margin key to calculate the order opening date.

Lead time scheduling :

1.Exact to second

2.ie production start date /time and finish date and time are calculated.

3. cap reqmts are generated.

4. uses times from routing.

5. carried out only if the scheduling mode in MD02 screen is kept with indicator 2.

From the order finish date the system subtracts the float after production to calculate the production finish date.

From the production finish date the individual operations in the routing are scheduled backwards to calculate production start date.

From the production start date the system subtracts the float before production

to calculate order start date.

Regards,

nandha