Lead time scheduling Vs Takt time scheduling

Hi Experts, we are planning to implement sap in one of our plants..below is our business structure for your understanding..
OEM - Mini bus Manufacturer which is the customer
Bus seat manufacturer - Our plant (we already have sap here) - we already have sap repetitive here
bus seat components manufacture - our plant (we are planning implement sap here)
based on bus seat forecast the component plant will drive their production and will be send it to assembly plant which is seat manufacture.
I have two questions
1. what should we do in our component plant discrete orders or repetitive? I know you cannot tell me without seeing the plant but that my question. what questions should be ask our business to make this decision? how do anyone make the decision of going either repetitive or discrete? pleade do not point out the link to rep vs dis.. I have already those but I need something more in detail..
2. I was reading a lot of help.sap.com and I have a question on below statement
Basically, you can use two different types of scheduling:
Sequencing with takt-based/rate-based scheduling
The system schedules the planned orders using the number of takts and the takt times/rates of the line hierarchy. You define the line hierarchy in Line Design. In this type of scheduling, the system does not create any capacity requirements and only schedules the main lines. The system does not schedule the feeder lines.
Lead time scheduling
In lead time scheduling, the system creates capacity requirements and also schedules the feeder lines. The system uses the operations from the rate routing or the standard routing for lead time scheduling.
what does lead time schuling will also do feeder line scheduling and take based does not schedule feeder lines means? can some explain with an example?
Thx
Swathi

any help is appreciated

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Is there any method to stop rescheduling of the PO Need By date from ATP if there is any holiday specified in shipping calender. The requirement is to update the schedule ship date on Sales Order but the lead time of Purchase Order should not increase

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I tried to closed one day in FR1 calendar and, after testing with order management, it appears that ATP didn't propose the closed day, so that's fine, but, our purchase order lead time was increased of 1 day and this is not what we expected.
Can you help us to find the right process.
Thanks

Hi Sandeep,
when we try to Rescheduled out the PO and the request is errored out the with the error:-
Start of log messages from FND_FILE
reschedule fails
old date in planner workbench: 19-MAY-11
new date: 07-JUN-11
header: 417474
line: 605652
po number: 2049031859
shipment no: 1
The need by date/promised date in the source instance is not the same as the need by date/promised date in the destination instance.
In the source instance,
The need by date is 19-MAY-11, and the promised date is 19-MAY-11
End of log messages from FND_FILE
---------------------------------------------------------------------------

Replenishment lead time & Scheduling Agreements - Please help

Hi,
I have a few questions & issues in regards to Replenishment lead time & Scheduling Agreements.
1.     Where are stock requirements & Replenishment lead times configured?
2.     What is a stock/requirements list?
3.     What is Replenishment lead time in MD02/MD04?
4.     Why do negative supply values appear under replenishment lead time in MD02/MD04?
5.     What are the differences between MD02 & MD04?
6.     How do you get to the following screen, since I canu2019t get here from MD02 or MD04 (missing buttons and Replenishment lead time information):
http://i34.tinypic.com/9hl9hz.jpg
Please help. This is very important.
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Laura

Hi Laura,
The RLT can be set in the Masters Materials.MMR and Also in the Documnet Type Configuration.
But as per SAP standard Procedure the Prority will be the document type.
That means the RLT given in the Order document will overseed the RLT given in the MMR.
Go to material master and select MRP3 view. There see what is maintained for "Strategy group". Now go to OVZG, select this Requirement Class and tick the field "Rq" against this.
Now go to OVZH, select your Requirement Type and ensure that the above Requirement Class is assigned to your Requirement Type.
Now create a sale order and check in MD04.
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Cheerzz..
subbzz..

Lead time scheduling- schedule result

hi all
in lead time scheduling, i go to CA02/3, then choose the "schedule",select "forward schedule" and put the base qty and the start date, the machine setup time display after runt he schedule is NOT same as when click the "schedule result ". it show 2.33 days...but my calculation is 2.03 days...
Anyone encounter same problem ?

solved

Lead time scheduling problem

Dear Gurus,
When I run MRP using lead time scheduling, scheduling is not taking place for planed orders, the start and finished dates are the same. I have already maintained the required formula for the processing time in the work centers of the operations.
What could be the reasons please suggest....
Thanks in advance!
Nilesh

Hi,
Please check your control key active for scheduling?
Then check your scheduling parameter in OPU5 and OPU3 should active for scheduling?
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R.Brahmankar

Need Automatic Lead-time scheduling in Planned Order using MD11

All,
Our users have a requirement that when they create a planned order using MD11, they would like system to do automatic lead-time scheduling based on the "basic finish date" entered by the user. Currently the system is taking 3 days from the in-house time maintained in material master to calculate the basic start date. But users want to use the 100 days that have been maintained in the routing.
Currently users have to click on "manual scheduling" on the planned order for system to pick up 100 days from routing which is an additional step for the users. Hence users want an automatic way in which system would do lead-time schedule when they enter the basic finish date.
Thanks,
Swapnil

Dear Swapnil,
In my understanding it is the standard SAP behaviour even if you have made the necessary settings in OPU5 for the planned
order type.
If my understanding is correct, then as per this setting the MRP behaves for the particular plant and order type combination.
Whenever you create a planned order manually you have to do a detailed scheduling and then you get the production dates
for the planned order.(This might be because generally when a planned order is converted into production order the system
carries out a lead time scheduling.- Check the same and correct me if I'm wrong)
Even if you update the material master through CA97,you will not get the detailed scheduling done along with the production
dates.So you have to perform this manual activity during MD11.
What is the reason of setting the in-house production time as 3 days,if the exact production time is going to be more?
Check and revert
Regards
S Mangalraj

Influence on lead time scheduling in MRP

Hello,
I am searching a possibility to influence the scheduling of planned orders, when they are created in the MRP run. There exists a BADI which is called when creating planned orders manually, but not in MRP. Its name is MD_PLDORD_SCHEDULING
Does anybody know about such an alternative for scheduling in MRP?
Thanks in advance
Roland Böhm

Hi,
During MRP run for single material by MD02 or on plant level by MDBT,
For MRP control parameters-
Scheduling take value as 2 - Lead time Scheduling and Capacity Planning.
and run the MRP.
With this you will get planned orders, and production rates are calculated as per time mentioned in routing.
But if you take scheduling value as 1 - Basic dates will be determined for planned order, then you system not consider lead time. Dates are picked from material master.
Srini

DIFFERENCES between BASIC SCHEDULING and LEAD-TIME SCHEDULING.

Hello SAP Gurus,
Kindly let me know the differences between BASIC SCHEDULING and LEAD-TIME SCHEDULING.
Looking for your early feedback.
Warm regards,
Kaushik.

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

MD04 dates not showing lead time scheduled dates

Hi experts,
In my MD04 screen, dates are not showing lead time scheduled dates (showing only basic dates scheduling) even after MRP run with lead time scheduling.
Please let me know if there is a way that the date column in MD04, shows the finish date from lead time scheduling.
thanks
Jay

Hello
Production dates are not displayed on MD04.
You can include additional fields on MD04 using a BAdI and you can use your own logic to add the production dates.
You will find the relevant BAdI on the following document:
BAdIs for MRP
BR
Caetano

Difference Between Basic Date Scheduling and Lead Time Scheduling.

Dear FRndz,
Kindly help me out the difference between the Basic Date Scheduling and Lead Time Scheduling.
Regards,
SRini

Dear,
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.
Same thread.
https://forums.sdn.sap.com/click.jspa?searchID=19281092&messageID=3548465
Please refer this link,
[Difference|scheduling]
Hope clear to you.
Regards,
R.Brahmankar

Difference between r/3 planning( lead time scheduling) and APO planning

Hello APO Gurus,
Please let me know the difference between the R/3 capacity planning by using lead time scheduling and APO capacity planning for a work centre.
Both in both cases you can use the lead time from routing OPERATION.
Please let me know where the planning differs.
Regards,
Ravindra Deokule

Check out
http://help.sap.com/saphelp_scm50/helpdata/en/99/ed3a981d0f11d5b3fc0050dadf0791/content.htm
particularly the section "Which functions of the operations relevant to scheduling are supported?"
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WO scheduling based on lead times defined in item attribute

I wanted WIP to consider the fixed & variable lead times specified for the item - where I am not rolling up mfg lead times using BOM.
Has anyone been able to automatically schedule WO start date based on the lead times inputted in Item attribute.
null

Dear Bimal,
The manufacturing lead times (setup and operation) are resource specific, and to declare them at item lead time attribute level is not practical (you need to define too many item levels in BOM to reflect every manufacturing step). The other work around is when routing is defined, you define two resource steps for each resource and make the first step lot basis and give setup time as usage rate and the second step item basis and operation time as usage rate. This gets reflected in manufacturing scheduling irrespective of quantity limitation (to define lead time at item level you need to define lot size also). I hope this takes care of your needs.

Scheduling Lead Times.....

Plant A gets components from 2 plants(Plant B and Plant C) u2013 I am not sure it is set up correctly to give the component plants enough time to produce and ship the components to get to Plant A on the promise date.
Example material - XYZ
Plant B put 17 days in In-House production in MRP 1 view. Plant A has values of 1 day in house production, 3 days GR processing time and 4 days planned delivery time.
I would like gurus to help me understand how these values work and if any changes are needed.
Thanks in advance
Thanks
Balu

Well, it depends what's in-house production time or lead time for XYZ of plant A?

Sales order is not taking shipping transit lead time into consideration

Hi,
We have following scenario -
1. Sales order is created in AT organization.
2. There is no onhand in any of the organizations including AT.
3. The scheduled ship date for sales order comes as order creation date + item lead time = 15-Sep-2011.
3. PO for sufficient quantity is available at UK org with need-by date as 01-Jun-2011.
5. Post processing item lead time for this item is 1 day.
4. intransit shipment is setup between UK and AT.
5. Shipment Transit lead times are also set up at 3 days between locations of UK and AT.
6. ASCP plan is run.
7. Sales Order is unscheduled and rescheduled via API MSC_ATP_PUB, which takes the ATP details from UK (based on the sourcing rules). The sheduled ship date comes as 02-Jun-2011 (PO need-by date + 1 day of post processing).
8. Expectation is that API should also take transit lead time into consideration while calculating the ATP dates and hence the Expectation is that scheduled ship date should come as 05-Jun-2011 (PO need-by date + Transit lead time + 1 day of post processing).
Please let me know
a. if this is standard functionality of oracle or not.
b. if this is standard functionality then what setups are missing required for the same to be achieved.
UAT is held up for this issue. Please help urgently.
Regards.

Oracle is supposed to take the in-transit time into consideration.
Are you running a constrained plan or an unconstrained one?
Make sure you defined the inter-org network as described in http://download.oracle.com/docs/cd/A60725_05/html/comnls/us/inv/shipne01.htm.
or go to Inventory > Setup > Organization > Inter-Location Transit Times and enter it there.
Sandeep Gandhi

User exit or Badi for changing the lead time in ATP check in VA01/VA02

Hi All,
Currently, SAP standard functionality takes up the lead times maintained in material master to create the schedule lines in the sales order in VA01. I am looking for some user exiit/Badi/Enhancement point where I can change the lead time. This is somewhat urgent so any help in this regard is appreciated.
Regards,
Sandeep
Edited by: Sandeep Gaitonde on Sep 1, 2011 9:16 PM

Hi Sandeep,
These are the user exits will trigger in va01 .
SDTRM001 Reschedule schedule lines without a new ATP check
V45A0001 Determine alternative materials for product selection
V45A0002 Predefine sold-to party in sales document
V45A0003 Collector for customer function modulpool MV45A
V45A0004 Copy packing proposal
V45E0001 Update the purchase order from the sales order
V45E0002 Data transfer in procurement elements (PRreq., assembly)
V45L0001 SD component supplier processing (customer enhancements)
V45P0001 SD customer function for cross-company code sales
V45S0001 Update sales document from configuration
V45S0003 MRP-relevance for incomplete configuration
V45S0004 Effectivity type in sales order
V45W0001 SD Service Management: Forward Contract Data to Item
V46H0001 SD Customer functions for resource-related billing
V60F0001 SD Billing plan (customer enhancement) diff. to billing plan
Please check this and post .
Regards,
Madhu.

Lead time scheduling Vs Takt time scheduling

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