Earliest start time in scheduling

Hi all ,
In routing when i carry out Scheduling the system shows the earliest start time and finish time , dates etc .
But when i am changing the LOT qty for scheduling in routing the system is Taking different timings (it shud start at 07:00:00 clk as in the work center the start time is given as 07:00:00 so it shud start at 07:00:00 in FRWD scheduling )
What exactly influencing the earliest start time ?
Regards'..
Edited by: venky shree on Feb 16, 2008 7:05 AM

hi
if you are maintaing production scheduling margin in material master that affects to calculate earliest dates that means if there is float before and after production. the system schedule operation including this floats.
regards
Pravin

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Hello Gerben,
Thanks for the reply, even though the default time zone set as GMT in user settings, the requested start time calender pop up the local time instead of GMT time.
Previously requested start time poped up the GMT time, we have observed this change once we have ran the redwood script for time window elements change and imported some of the job definitions, applications & time windows from other system.
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Script Fuctionality
1. Take the mentioned time window
2. iteratate thought the time window elements and add 1 hour to the "time to day from" & "time to day to" parameters.
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// Variable Declarations
String timewindow = null;
String query = null;
TimeWindow tw = null;
TimeWindowElement twe = null;
long otdvalue = 3600000;
long l1 = 0;
long l2 = 0;
long threshold = 0 ;
long expvalue = 82800000;
long expvalue1 = 85500000;
long indto1 = 0;
long indfrom1 = 300999;
long indto2 = 2700000;
long indfrom2 = 3000999;
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               l2 = indfrom1;
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Can a job have a start time different from its schedule?

I have a WEEKDAY schedule defined as follows:
begin
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end;
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Here is the error I am getting:
begin
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end;
begin
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          job_type => 'EXECUTABLE',
          schedule_name => 'WEEKDAY',
          job_action => '/usr/bin/ksh',
          number_of_arguments => 2,
          enabled => FALSE,
          auto_drop => FALSE,
          comments => 'Display shell information'
end;
begin
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end;
begin
ERROR at line 1:
ORA-27488: unable to set START_DATE because SCHEDULE_NAME was/were already set
ORA-06512: at "SYS.DBMS_ISCHED", line 2806
ORA-06512: at "SYS.DBMS_SCHEDULER", line 1913
ORA-06512: at line 2

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<i>'Award points for useful info'</i>

Hw to caculate setup & Process time while scheduling?

Gurus,
Kindly guide me how the setup times & processing times are calculated in
http://help.sap.com/saphelp_46C/helpdata/EN/a5/63198843a211d189410000e829fbbd/frameset.htm
Really, I could not understand, why 1/8 (7.5 min) is added for setup time & 4/8 (30min) is added to process time in the example.
Best regards,
Kumar.

Sorry Gurus,
URL is not working fine. Hence iam pasting the content.
Example: Determining the Operation Dates
An order contains two operations (operation 10 and operation 20). The order quantity is 100 pieces and the order start date has been set to Tuesday, May 2nd. The scheduling type is forward scheduling.
Duration of the Individual Operation Segments for Operation 10
First, the system calculates the duration of the time segments for the operations (see Duration of the Operation Segments). To calculate the execution time, the system uses the formulas stored in the work center for setup, process or teardown and takes into account the performance efficiency rate specified for the individual standard values:
1 hour setup + 4 hours processing + 1 hour teardown = 6 hours execution time
The operation lead time is calculated by adding queue time and wait time to the execution time:
4 hours queue + 6 hours execution + 15 hours wait = 25 hours lead time
A move time of 0.5 hours is maintained between operation 10 and operation 20. This is assigned to the preceding operation (operation 10).
Calculating the Operating Time for Operation 10
The operating time of the work centers is calculated as follows:
The system calculates the working hours (standard available capacity) of the work center:
16:00 work finish - 7:00 work start = 9 working hours
The break times are subtracted from the working hours:
9 working hours - 1 hour breaks = 8 hours
The operating time of the move time is specified in the move time matrix: The shift starts at 7:00 and finishes at 17:00 and is a total of 10 hours.
Selecting a Calendar
The system now selects the valid factory calendars. The same factory calendar is maintained in both work centers. According to the factory calendar, work is carried out from Monday to Friday.
Calculating the Dates for Operation 10
The system has now collected all information relevant to scheduling and has calculated the duration of the individual operation segments. The next step is to calculate the operation dates. The system lines up the order floats and the individual operation segments along the time axis, taking into account the operating times.
The production order is scheduled using forwards scheduling so the system starts with the order start date (Tuesday, May 2nd).
Starting at the order start date, the float before production of one day is first added to the time axis. The scheduled start of the order is, therefore, Wednesday, May 3rd.
Starting from the scheduled start, the operation segments are now lined up on the time axis and the breaks are distributed proportionally among the individual operation segments.
Calculating the Operation Dates for Operation 10 Without Queue Time (Earliest Date)
Segment     Duration     Operating time/day     Start     Finish
Setup     1 hr     8 hr     3rd May 07:00:00     3rd May 08:07:30 1)
Process     4 hr     8 hr     3rd May 08:07:30      3rd May 12:37:30 2)
Teardown     1 hr     8 hr     3rd May 12:37:30      3rd May 13:45:00
Wait     15 hr     24 hr 3)     3rd May 13:45:00     4th May 04:45:00
Move      0.5 hr     10 hr     4th May 07:00:00      4th May 07:30:00
1) The wait time is scheduled independently of the factory calendar.
2) The duration of the setup results from: Setup = 1 hour * (1 + 1/8) = 1 hour 7.5 minutes
3) The duration of processing results from: Processing = 4 hour * (1 + 4/8) = 4.5 hours
Calculating the Operation Dates for Operation 10 with Queue Time (Earliest Date)
Segment     Duration     Operating time/day     Start     Finish
Queue     1 hr     8 hr     3rd May 07:00:00     3rd May 11:30:00 AM
Setup     1 hr     8 hr     3rd May 11:30:00      3rd May 12:37:30
Process     4 hr     8 hr     3rd May 12:37:30     4th May 08:07:30
Teardown     1 hr     8 hr     4th May 08:07:30     4th May 09:15:00
Wait     15 hr     24 hr *     4th May 09:15:00     5th May 00:15:00
Move      0.5 hr     10 hr     5th May 07:00:00     6th May 07:30:00

Changing Operattion Earliest Start/Finish Dates?

Hi EAM Gurus,
I want to change the operation Earliest start/finish dates & times also. Is it possible?
Also I am thinking if I create a custom report (similar to IW37n) which allows me to change operation earliest start/finish dates.
Is there a USER EXIT/BADI which will allow me to change the dates?
I can change the operation date & time in capacity planning table (tabular form - CM34) by using manual dispatch button. I want to incorporate same kind of functionality in a custom report.
I am waiting for your expert advice/suggestions.
Thanks in Advance
Adi

Hi,
In the end, yes, once actuals are recorded, all these values are the same - but before that they can all be different!
Before an actual start is recorded, the column shows "NA" (wich obviously is different from Start :-)). To the scjheduling engine, thsi means the start can be freely calculated (from predecessors or resource leveling, f.i.) whereas when a date
appears in Actual Start, Project will take that value as carved in granite - it is supposed to show past reality, and reality is more powerful than values calculated by the scheduling engine!
So these two values are not Always identical!
As for Scheduled start, that is indeed meaningless for automaticlly calculated tassk. But for manually scheduled tasks it does play a role. For a manually schduled task, you can set any start value you want (even a litteral such as "when we have
the time"). Still, there is an option to make manually scheduled tasks obey links - the result of that calculation is then put into scheduled start - and so there can be a difference between these two columns as well.
So, no, these 4 values do not have the same function. They are ony identical as soon as actuals are recorded but what do you expect? There is only one past reality, Project does not work with a parallel universum :-)
Hope this helps,

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hi guysm i have 76 process chains that run every day in BWD system, so i removed all the timings from the start variant and in the infopackages, but it seems some process chains are still running, i did do the following steps on chnaging the time from a particular time to immediate, Save, Check and activate, i didnt schedule it as i dont want it to load right away .
do i have to hit check , save , schedule once i change the time from a particular time to immediate load or activate will work as well.?
what else could be the cause of process chains still loading even there are no events, or time given to any process chains at all.
i went to sm 37 and i can see the bi process are all running at the time they were orignially set up on.
so any suggestions would help,
is there any way from sm 37 i can tell which process chain is triggered off?
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Dante, the start conditions on the infopackages do not affect when they run in process chains. The process chains have their own start job. If you want to change the start time of a process chain, then you need to go to maintain the process chain, right-click on the Start process and select Displaying Scheduled Job(s)... . Here you will see a job called BI_PROCESS_TRIGGER. Change the start conditions of this job.
The start job for all process chains is BI_PROCESS_TRIGGER, so using SM37 may be difficult to identify which BI_PROCESS_TRIGGER job is associated to a particular chain.
Also, to let you know, each process in a process chain has an associated job. All jobs called BI_PROCESS_xxxxx are jobs associated with a process chain.
Eg.
BI_PROCESS_LOADING is an infopackage.
BI_PROCESS_TRIGGER is the start job
Does this help?

Estimated Start time in notification based on Time defined in Work center

Hi,
Following Satish post- I am trying to find solution to the same problem so i will appreciate any advise.
When the notification is created ,the estimated start time should be based on priority .This in iteslf is pretty straight & simple. However if the reported time is after work hours or towards the end of work hours or weekends , the estimated start time should be reflected accordingly based on factory calender & work center time schedule.
In other words the estimated start time should fall within the window of work hours available.
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Presume the the working hours for the Organization are 8:00AM to 5:00 PM & a call comes for service at 4:00 PM. Also say , for high priority the defined response time is 5 hours. In such a instance the estimated start date should be set to next day at 11:00 AM.
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Shirly

Hi,
I think ur talking about notification malfunction start time .. currently it just takes the system date and time by default .. and if you need work center timings i believe first u need the eqpt /F.loc to get the work center data in notificaiton ...
I think u can get these dates can be modified while saving by using user exit : QQMA0014 QM/PM/SM: Checks before saving a notification or BADI IF_EX_NOTIF_EVENT_SAVE , but at the same time the eqpt or F.loc have work center details in master record ...or work center needs to be entered manually in notification ..., pls check up ..
regrds
pushpa

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Dear Experts,
I am facing a very strange issue. Whenever I am trying to manually create and schedule a discrete production order in ECC 6.0, with 1-forward scheduling (in CO01 transaction), by giving scheduled start date and time and pressing the "Schedule" button; the system changes the start time given by me (the date remains) and executes the scheduling with that start time.
For example, when I want to produce 12072 PCs, and I give 08:00 as shceduled start time, the system changes it to 15:59, adds the operation times correctly and defines the 'correct' scheduled end date (again, with fwd scheduling type!).
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I made the following checks in the system:
production calendar is set correctly, it is not blocking the production
all the applied work centers are available from 00-24 hrs
no shifts has been defined on any of the WCs, production is enabled in 00-24 hrs
there is no other production scheduled on any of the work centers, capacity load is 0% on all of them, as it has been checked in CM03
order scheduling was performed with '1-forward' scheduling type
anyway, capacity check is switched off in the system
formulas on the work centers are all correct, the processing time calculated based on them is also correct (No queue, wait, setup, etc. times are set in the system, we are only using processing times.)
no error messages
As far as I know, in the above case lead time scheduling must be carried out, the system is simply 'not allowed' to change the start date given by me, just add operation times to the start and define the scheduled end date.
Thank you in advance,
T

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Caetano,
in my case the order scheduled start date is exactly the same as the operation start date. The problem is that this date cannot be manually scheduled to a certain time interval, the system changes the scheduled start date specified by me. (Like there was a "blocked period".)
Thank you,
T

Function Module for Start time and End time

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We have one specifi user , for whom some back ground jobs are scheduled each day .
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Time Intervals & Schedules

Hi,
Can we apply a time Interval & schedule to a sql query? I have defined a time interval and am using that to query a DateTime field in my table. Its not taking the time Interval for the selected Start & End dates and hence the results are not per the time interval selected... Any ideas?
Thanks

This is the Data in My SQL table :
Name      Age                  DateTime
Abesh          26     2006-12-15 07:00:00.000
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Pradip         25     2006-12-18 07:00:00.000
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Age           : Int
DateTime   : Datetime
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Name            Age              DateTime
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Earliest start time in scheduling

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