Wrong lead times calculated between activities

Hi expert,
Client has following activity flow: 1 - 1A - 1B - 2. Relationship lead times: 1- 1a: 5day, 1a- 1b: 5day, 1b- 2a: 0day, 1- 2a: 1day.
We have maintained relantionships as necessary. But lead times from activity 1 to activity 2 is still not calculated as 1 day. Lead time for actitivity 2 calculated after activity 1B.
Please advise on solution.

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Lead time calculation

Dear Gurus,
I want to calculate lead time between purchase order and goods receipt.how to do that???
Am having some doubts.
Does the lead time links with
Planned Delivery Time
Goods Receipt Processing Time
Purchasing Processing Time in material master. plz explain???

Hi,
If you create PR for a material, using MRP, then the planned delivery time would be picked up from the material master, please note that there is no source maintained yet in the PIR, so obviously that rules out planned delivery time of PIR and Vendor Master( even when u convert this P.R to P.O the planned delivery time will not change and will not be taken from the PIR)
Now if you directly create a P.O then the planned delivery time of the PIR is picked up , please note this difference.
I would recommend that you change the planned delivery time in the material, mnake it different from the planned delivery time of the PIR, and then run MRP, You will see that the planned delivery time in the PR would be based on the material planned delivery time.
Even if you assign source and convert this P.O using ME59 the PDT will not change.
Then you can try and create a P.O directly with the vendor, here you will notice that the PDT flows from the info record.
Please let me know if this addresses your concern.
Regarding your soure list issue, either you can remove the source list mandatory tick in MM or add the vendor whose PIR you are using into ME01, and it will definitely work.
Regards
Shailesh
Edited by: Shailesh Rajan on Jun 30, 2011 7:51 PM

Lead Time Calculation in SNP Heuristics

Dear All,
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Ex: Distribution Center to Production Plant and
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Thx,
Ram.

Hi,
Please check the below link for help: [Scheduling|http://help.sap.com/saphelp_scm70/helpdata/EN/05/f8923945b12c4de10000000a114084/frameset.htm]
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Ada

How is lead time calculated for QM notifications

Can somebody please tell me what fields are used to calculate lead time? It is field SUMDLZT in MCQMEL? Is there documentation on how this is calcuated?

MICK,
Could you give more details on the same / explain a scenario for which you need this information.
Since there has been no activity on this post for about a month , I will close this as answered , however if you still want this to be answered - mark it an unanswered and add more details to the same so that you can get more relevant answers.
Arun

Lead Time calculation in process order

Hi,
I have a process order to be created of 112.6 L. i have only one phase & one resource allocated. i have maintained my OH time as 1 H in my master recipe. now for resource i have maintained scheduling formula as ZRUNA = OH.
After creating Process order the system calculates phase timing as 1:17:44. Can anyone pls let me know how did system calculate 17 min & 44 sec extra.
Thanks & Regards,
Rohan Somji

Dear Rohan,
1.Check the length of break timings defined in the resource that is assigned in the phase.
2.Check in OPUZ whether for the process order type and plant combination whether scheduling is to include the break time also
(whether the check box for scheduling with breaks) is included.
Check and revert back.
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Mangalraj.S

Lead Time in Item Master

Hi
Does Lead Time in Item Master respect weekends and only count working days?
Meaning, for two weeks do I enter 10 or 14?
Thanks
Franz

Hi Franz
As far as I know, NO. You only have the option to include holidays in the MRP wizard itself which will then calculate against lead times. Best would be to test on a test database with both scenarios (with 10 or 14, and tick/untick holidays in MRP) and see what the results are.
According to the Online Help the above is correct:
Consider Holiday Table for Production Planning Factors in holidays and weekends in lead time calculation, as defined in the Holiday Details window. Holidays and weekends increase the lead time interval for MRP calculations.
Consider Holiday Table for Purchase Planning Factors in holidays and weekends in lead time calculations, as defined in the Holiday Details window. Holidays and weekends increase the lead time interval for MRP calculations.
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in subcontracting, there is obviously some time constraint: I have to submit a freight order to the carrier at least x days/hours before planned loading date. As far as I can see, there is no such field in the carrier profile (where it could be associated with transportation lane or at least starting location). Another logical point would be the freight agreement (I agreed with the LSP that he can handle all freight I submit to him x days/hours before planned loading date), but nothing there as well. The only way I see to model this is via incompatibilities (do not assign a freight order to a specific carrier if the loading date is less than x days/hours ahead of actual date), but this seems not very convenient to me.
Any other ideas?

Hi Franz
As far as I know, NO. You only have the option to include holidays in the MRP wizard itself which will then calculate against lead times. Best would be to test on a test database with both scenarios (with 10 or 14, and tick/untick holidays in MRP) and see what the results are.
According to the Online Help the above is correct:
Consider Holiday Table for Production Planning Factors in holidays and weekends in lead time calculation, as defined in the Holiday Details window. Holidays and weekends increase the lead time interval for MRP calculations.
Consider Holiday Table for Purchase Planning Factors in holidays and weekends in lead time calculations, as defined in the Holiday Details window. Holidays and weekends increase the lead time interval for MRP calculations.
Kind regards
Peter Juby

ASCP Yield and Resource Lead Times

Hi,
I am working on Advanced supply Chain Planning on R12. Both ERP Source and Planning are on different instances. We are also using Oracle Shop Floor Management. In the Network Routings we have included a lead time resources at step 10, 20, 30. The resources are as follows:
These resources are defined as 'Machine'
Resource for operation 10: ASSY-LT, 112 hours, Schedule 'yes'
Resource for operation 20: TEST-LT, 64 hours, Schedule 'yes'
Resource for operation 30: PACK-LT, 48 hours, Schedule 'yes'
We also have only one shift with 8 hours. The resources are not available for 24 hours.
We also have yield at each of the above operations.
Lead time rollup calculates 28 days for the item correctly.
We are encountering a problem with ASCP Plan. The start dates and yield calculations using constrained plan with Enforce Demand Due Dates constraint seems problematic. If we check 'Calculate Resource Requiremnents' option, the plan calculates yield but the lead time gets reduecd by one third and start and completion dates for a planned order (and ATP etc.) are not accurate.
If we uncheck 'Calculate Resource Requiremnents'option in the plan, lead times are accurate but plan does not calculate yield.
We are not sure what is causing the problem.
Does anybody know what options or profiles control this behaviour?
Your help is highly appreciated.
Thanks.
Vijay

Hi Vijay,
important for your lead time calculation is the setup of the calendar and shifts and what shifts are assigned to the resource.
You say you do not have enabled the 'Available 24h' option. We are also using leadtime resources in certain cases, for example LT for Assembly. But in these cases we enable the 24H option. Next to this we set the Resource capacity to 'unlimited' by setting units to a very high number (1000 etc.) on resource level, to prevent that the system gets into capacity conflicts here.
And the yield calculation indeed should be quite independent of the leadtime resource.
best regards,
David.

Difference between Req with insufficient lead time and lead time const

Hi ,
1) Can anyone explain the difference between Requirement with insufficient lead time and Requirement lead time constraint exception messages. Both seems to be similar for me with the compressed time.Also at what situations these exceptions are generated.
2) what is minimum lead time required ,actual lead time and its calculation.
Thanks...

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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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.
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nandha

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

Calculating Lead time.... Help......

We have two field in qals
QALS: Lot created     (ENSTEHDAT)
            Time                (ENTSTEZEIT)
Similarly we have two field in QAVE
QAVE: UD Code Date
            Time            (VEZEITERF)
I need to calculate the lead time
i.e.
Lead time = (Lot Created date & time - Date of UD & Time - Holidays as per factory calendar) / 24:00:00 hrs.
How to proceed????

hi Uttamagarwal,
Please check the below sample Code. You need to do declare the Appropriate Variable and ITAB.
"as NSTomar said , First use the FM to get the Date and Time difference
call function 'SD_DATETIME_DIFFERENCE'
exporting
    date1                  = enstehdat "Lots Created Date
    time1                  = entstezeit " Lots Created Time
    date2                  = vaedatum " UD Change Date
    time2                  = vezeitaen " UD Change TIme
importing
   datediff               = date_diff
   timediff               = time_diff
*   EARLIEST               =
* EXCEPTIONS
*   INVALID_DATETIME       = 1
*   OTHERS                 = 2
if sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
* then Please use the below FM To get the Number of Holidays
* between the Lots Created date and UD Changed date
call function 'HOLIDAY_GET'
EXPORTING
*   HOLIDAY_CALENDAR                 = ' '
   FACTORY_CALENDAR                 = fac_cal   " Pass the Factory calendar here
   DATE_FROM                        = enstehdat      " Lots Created Date
   DATE_TO                          =   vaedatum       " Ud Changed date
* IMPORTING
*   YEAR_OF_VALID_FROM               =
*   YEAR_OF_VALID_TO                 =
*   RETURNCODE                       =
tables
    holidays                         = it_holidays
* EXCEPTIONS
*   FACTORY_CALENDAR_NOT_FOUND       = 1
*   HOLIDAY_CALENDAR_NOT_FOUND       = 2
*   DATE_HAS_INVALID_FORMAT          = 3
*   DATE_INCONSISTENCY               = 4
*   OTHERS                           = 5
if sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
"Check the Number of Entries in it_holidays which is equal to Number of Holidays
describe_table it_holidays lv_count.
if you want to find the date difference i.e., Lead Date
Lead date = date_diff + lv_count
if you want to find the time difference i.e., Lead Time
Lead Time = ( ( date_diff + lv_count ) * 24 ) + time_diff
Edited by: Rob Burbank on Aug 5, 2010 9:26 AM

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We use stock transfer orders between different storage locations. Is it possible to maintain the transport lead time between storage locations somewhere or do in need to use routes and scheduling?
rgsd
GAR

Hi,
Try using movement type 313 and 315
313 -- Transfer posting SL to SL --- Remove from issuing SL
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I was wondering if someone knows how lead time is being caclulated for 2LIS_05_QVUDN. I've found the tables associated and the function module but I can't find the actual calculation
Thanks

Hello
The lead time in working days works like this
If you have 1 inspection lot for a material   -the time from Lot creation to Usage decision given is the lead time.
                                                          Lot created               Usage Decision made       Lead Time
for eg Material X , inspection lot no   14/05/2008 10: 00          14/05/2008 14: 00            4 Hours
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Thanks in Advance
Regards
Ravi

Refer The Oracle document
Manufacturing Lead Time Computations
Manufacturing Lead Time Computations (Oracle Bills of Material Help)
Rolling Up Cumulative Lead Times
Rolling Up Cumulative Lead Times (Oracle Bills of Material Help)

Wrong lead times calculated between activities

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