Scheduling type Backwards vs Backwards in time in OPU3

Hello All,
I have a question regarding the Scheduling type in OPU3.
What is the difference between Backwards and Backwards in time?
Thanks in advance
George

Hi George,
It's nice to ask qns in forums & get feedback from forum members, but i notice that you have marked all your queries as answered, but not acknowledge anyone's inputs or awarded them points.
Don't you think its a matter of courtesy to acknowledge the inputs?
Also would like to request all people who post questions in this forum, to acknowledge & award points to the contributors.
Hope the moderators take note & put in place some checks as there are quite many of such people.
Regards,
Vivek

Similar Messages

Scheduling type - Backwards in time

Hi,
Please explain the difference between the scheduling types 'Backwards' & 'Backwards in time'.
Case 1: I convert a planned to a process order with 'Backwards' scheduling. Following dates are observed:
Scheduled finished    2009/08/06   17:00:00
Basic Finish date        2009/08/07   00:00:00
Case 2: I convert a planned to a process order with 'Backwards in time' scheduling. Following dates are observed:
Scheduled finished    2009/08/06   17:00:00
Basic Finish date        2009/08/06   17:00:00
Can anybody explain the basis of difference of behaviour.
regards,
Mohit

Hi,
Using Backward scheduling, when you create a prod order system will allow you to enter only finish date. But using Backward scheduling with time, when you create a prod order system will allow you to enter finish date with time.
You have mentioned 2 cases. Both are same.
In case1,
Scheduled finished 2009/08/06 17:00:00
Basic Finish date 2009/08/07 00:00:00
System finishes the work on 2009/08/06 at 17:00:00. This is the end of the day as per your workcenter (check in capacity header view) and basic finish shows 2009/08/07 00:00:00. This is the start of the next day also known as end of previous day.
Regards,
Dharma

SCHEDULING TYPES

Hi All,
         Please guide me to understand the following SCHEDULING TYPES will be grateful.
In transaction "OPU3 " there is a field called "SCHEDULING TYPE" it has several types (1) Backwards, (2) Backwards in time, (3) Current date, (4) Forwards, (5) Forwards in time, (6) Only Capacity requirement.
I would like to know the functionality (i.e., Working methodology) with Scheduling & production orders of following SCHEDULING TYPES
Only Capacity requirement
Backwards in time
Current date
Forwards in time
Provide me with simple example.
Thanks in Advance

Hi,
Forward Scheduling
If you have specified forward scheduling in the network header as the schedule type, you must also specify the basic start date of the network.
The system starts from the basic start date and schedules forward in time to calculate the earliest dates of the activities and the scheduled finish first. Then it calculates the latest dates of activities and the scheduled start of the network.
If you have also specified a basic finish date in addition to the basic start date in the network header, the system uses the basic finish date as the starting point for backward scheduling.
Backward Scheduling
If you have specified backward scheduling as the scheduling type in the network header, you must enter the basic finish date of the network.
The system starts from the basic finish date and schedules backward in time to calculate the latest dates of activities and the scheduled start. Then it calculates the earliest dates of activities and the scheduled finish of the network.
If you also enter a basic finish date in addition to the basic start date in the network header, the system uses the basic start date as the starting point for forward scheduling.
Current Date Scheduling
With scheduling to current date, you can see whether the network can be completed by a certain date. In this method, the system uses the basic finish dates and schedules the network backwards and then starting with the current date, schedules forwards.
You can use the floats in the activities to determine how many days you still have or are short to make the finish date.
Only Capacity Requirements
If you specify capacity requirements only as the scheduling type in the network header, the system copies the basic dates from the network header into the scheduled dates and into the earliest and latest dates of all activities.
When you have the system only calculate capacity requirements in scheduling,
          o Time constraints of the activities are taken into consideration
          o Relationships are ignored.
Special Function: Today Scheduling
"Today" scheduling is a special function in scheduling. In Customizing for the Project System, you can specify the number the days that the scheduled start may be in the past. If the scheduled start of a network is further back in the past than allowed, the system at first attempts to reduce the duration. If this is not sufficient, the system automatically schedules forward starting with todayu2019s date.
It is possible to have negative float times with today scheduling.
The backwards scheduling calculates a scheduled start that is in the past despite maximum reduction. Forward scheduling then calculates the scheduled finish, starting at todayu2019s date and using maximum reduction.
Thanks
HK

Energy Saver Schedule is backwards

Hello everyone,
Does anyone have an issue with their schedule being backwards? I have my computer set to start up or wake everyday at 6:00 am and to shut down every day at 11:59 pm. I used to go to sleep knowing my computer was turning off and get up in the morning to have my computer - ready to use... but now for some reason, when I go use it in the morning, I notice the shutdown window is up stating that the computer is about to shut down unless I cancel. That should've happened at 11:59 pm. So, it seems that the computer is backwards somehow.
Is this a known bug with BootCamp and the fact that the Windows partition changes the clock? Once I reboot into OS X, the time auto corrects because I have it set automatically, so I'm not sure if thats correct or not?
Thanks in advance!
-JD

Test failed.
See my iTunes Alarm 213 in Mac OS X v10.4 Tiger > Discussions for details of many failed solutions.
Somehow Energy Saver/Schedule failure is linked to recent failure of iTunes Alarm 213. It awoke my computer and played a radio station for several months but recently starting asking for admin password which it then rejected as incorrect (even tho password was OK elsewhere). Password change failed to solve problem. Would using AppleJack and CleanMyMac help? Using an OS on a maintenance CD to use Disk Utility/Repair Disk?

Scheduling types in PM order

Dear All,
Can Anybody explain different types of Scheduling types which are used in sap pm orders?And what are its affects on the order?
1) Forwards
2)Backwards
3)only capacity requirements
4)current date
5)Forwards in time
6)Backward in time.
Regards,
Bhanu

Hi,
Forward scheduling
When you set this indicator, the system schedules:
Orders forwards, based on the basic start date
Collective orders forwards, based on the specified outline start date
Networks forwards, based on the specified basic start date, and then backwards, based on the scheduled finish date or on the specified basic finish date
Backward scheduling
If you set this indicator the system schedules
orders backwards starting from the basic finish date
collective orders backwards starting from the framework finish date,
networks backwards starting from the specified basic finish date, then forwards starting from the scheduled start date or the basic start date specified.
Only calculate capacity requirements
Specifies that the system only calculates capacity requirements.
Use
In production orders, the system calculates the scheduled start and finish of the order by deducting the float before and after production from the basic order dates (order start and order finish). The calculated dates are written into all operations in the order.
In networks, the system writes the basic dates from the network header into all activities in the network.
If you use this scheduling type, the dates of all the operations/ activities are identical.
The capacity requirements are distributed across the period between the scheduled start and the scheduled finish.
Costing calculates no capacity requirements when this scheduling type is used.
Schedule from current date
If you set this indicator the system schedules
orders und collective orders forward, starting at today's date
networks backwards, starting at the basic finish date, and then forwards, starting at today's date.
Foward/Backwards in time:
Basic dates with time of day
You use this indicator to determine for process orders and production orders that when you enter the basic dates, you can also enter the time.

Scheduling type

Hi
What is scheduling type forward in time and backward in time?
How it is different from backward and forward scheduling

Hi,
In simple words:
In backward & forwards scheduling the resolution is in days, so when you do scheduling it would be in terms of start date & end date.
With backwards in time & forwards in time, the resolution is in minutes. Meaning you can specify not only the start & end dates but the time with a least resolution of 1 minute. Implying that it is more accurate.
Instead of me writing too much, do a simple test in your sandbox, open any production order, select the scheduling type as forwards in time / backwards in time & you will notice that the time field adjacent to start & finish dates which is grey, will become editable. So for testing specify a time & do scheduling.
Revert if you face any issues.
Regards,
Vivek

Network Scheduling type

Hi
I have maintained network scheduling tpye as backwards in OPU6 and also maintained as "backwards" in control parameters for WBS scheduling. This is meant for both template project and operative project/network profiles.
I have created a template project with WBS heirarchy along with network activity scheduling types set as backwards.
Now while "including" the template project in an operative project, the system copies all the WBS elements and network activities from template project. However, the network schedulihng type is coming as FORWARDS, instead of "backwards".
Can anyone suggest what could be the problem here??
Best Regards
Srikrishna

Hi,
your cust. is correct.
activating check box for template profile data while copying the project hopes will resolve the issue.
if the check box is active it copies the data from profile or else it copies data from the project which you copy.
rgds
Anish

MRP - Auto creation of del schedule lines based on planned delivery time

Hi,
We have activated MRP (type PD) where Purchase requiesition is auto created by system for requirement quantity. We require to optimize delivery schedule in such a way that entire PR quantity is broken into various delivery schedule based on planned delivery time and requirement. Scenario can be further explained with following example.
Material Requirement for a month is say 1,25,000 units
Closing Stock say 25,000 units
PR Generated by system for 1,00,000 units. The entire quantity is schdulled with only one delivery schedule line as per planned delivery time.
The requirement is to generate multiple delivery schedule lines automatically in Purchase requisition based on planned delivery time so that Purchase orders can be placed with system generated delivery schedule lines.
How can it be achieved ?
Regards,
Nirav Kinkhabwala

Nirav,
This subject has been discussed repeatedly in this and other forums. I must assume that you overlooked the rules of engagement, which state that you should first search the forums and other public sites, before posting questions here.
Standard SAP MRP cannot be made to generate multiple items in a Purchase requisition. The functionality you seek is usually achieved when converting purchase reqs to Purchase orders, where many single purchase reqs can be adopted into a single Purchase order.
You also might want to investigate use of Vendor Scheduling agreements.
Best Regards,
DB49

Process order scheduling type

Hi Team,
While scheduling the process ord (COR1) , with scheduling type"No scheduling", when we enter any future date in schedule start & finish date, system changes these dates to "future date-1" & time to 24:00. We need that system should not change the date provided by the user ie keep the date as provided by the user.
Awaiting your suggestions,
Thanks in advance.
Regards,
Jack

Please refer following notes, 151503
In that
In-house production time is larger than 0 days:
For material-related orders, the system interprets the order finish date as a requirements date for the material. Therefore, the following rule applies: If an in-house production time greater than 0 days has been defined in the material master, the requirements date is at the beginning of the day, that is, the order finish date is set to 00:00. In this case, the order finish date of the production finish date differs by one day from the order because the production must have already been finished on the previous day so that the material is available at the beginning of the next day.
With an in-house production time equal to 0 days, it is assumed that the material can be produced at any time of a day. For this reason, the order finish date is set to 24:00

Scheduling type for production order.

Hi Gurus,
i have some doubts about production order scheduling. i have run a scenario OF MTO to Understand The Scheduling. i had created a BOM with two components. The inhouse production Time of header Material is 3 days.and the scheduling Margin key is op2 flt aft1 flt bfr 1 rl per 2
after creating a sales order i had run MRP in MD50 by selecting scheduling 1 Basic Date Determination. it has taken the 3 days of in house production time and praposed dates.18th as starting date and 20th as finish date.and planed opening period is in past. and it has not praposed any scheduled dates in planned orders.
if i convert the planned order in to production order it is praposing the scheduled dates.
scenario 2.
if i run the mrp for the same order by taking scheduling type as 2 lead time scheduling. in planned order itself it is showing sheduled start date and scheduled finsh date. (which not shown in basic date run).
1.so is it mean that what ever the scheduling type we are using in MRP run is only applicable to create Planned orders only while convrting the planned orders in to production order dates will be re detemind. is this currect or wrong?
2.in which scheduling type system will not consider the scheduling margin key?
please help me to understand these questions.
Thanks&regards,
Venkat Bolla.

Hi Venkat,
When MRP is run with '1' Basic Scheduling - Schedule Margin Key is not considered. As you rightly observed it considers the Inhouse Production days mentioned in materials master for fixing the start date. This is exactly to days.
When MRP is run with '2' Lead Time Scheduling - Schedule Margin Key is considered. Dates are calculated from Routing and Capacity requirement calculations are also done. Here calculation are exact to the seconds.
Schedule Margin Key takes effect only for lead time scheduling. Production dates are calculated from the float times of the SMK in the material master and times from the individual operations maintained in routing.
When planned order derived from Basic scheduling is converted to production order it is subjected to lead time scheduling and thus production dates are calculated
Refer to the below discussions on the same topic.
http://scn.sap.com/thread/1535577
http://scn.sap.com/thread/1554548
Thanks & Regards,
Ramagiri

Scheduling Type error

Dear P Gurus,
i am doing OPU5, in that there is subscreen Scheduling control for detailed scheduling, in which field scheduling type. In this field while doing drop-down- no values appears.
please guide
thanks in advance
kailash
9869171090

Dear,
What about my reply? Did you check it?
Mr. Kailash please come back and explain???
I have given you correct answer first. Is any difference in between these two answer??
Regards,
R.Brahmankar
Edited by: R Brahmankar on Dec 12, 2008 12:26 PM

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Attendance type for training in negative time management

Hi,
We are using negative time management. Attendance Type T-Training is created. I have specified in the integration switch PLOGI-TIME 1 and specified the attendance type in SEMIN-APART. But even when I firmly book a business event, the attendance type is not stored in the attendances of the employees who are booked to the training event.
Is the attendance stored automatically when the business event is firmly booked in negative time management? Or this is applicable only to the Positive Time Management?
Please help.
Regards,
Sasi.

Hi Dear,
In "Specify Attendance Types" node under Integration with Time mgmt in TEM node in SPRO. Kindly check the following points:
PLOGI,,TIME,,1,,Integration switch: Training and Event Mgmt/ Time
SEMIN     AINST     "value as maintained in Time Managment" for Attendance type for instructor in T554S
SEMIN     APART   "value as maintained in Time Managment" for Attendance type for instructor in T554S
SEMIN     TIMEP    According to your requirement
kindly check the value for the above two field under
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and check the value maintained Trainee Attendance and Trainer Attendance. Following is maintained as default.
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let me know if you have any issues.
Thanks and Best Regards
Puneet

Exact Steps to schedule a background job a specific time daily :

Dear All,
Please let me know the whole process involved in schedule a background job a specific time daily. what is calender id. I could not understand what it has given in SM36.
Thanks in advance.
Rgds
Prem.

Hi prem
this is complte procedure for ur requirment.
Scheduling Background Jobs
Use
You can define and schedule background jobs in two ways from the Job Overview:
Directly from Transaction SM36. This is best for users already familiar with background job scheduling.
The Job Scheduling Wizard. This is best for users unfamiliar with SAP background job scheduling. To use the Job Wizard, start from Transaction SM36, and either select Goto ® Wizard version or simply use the Job Wizard button.
Procedure
Call Transaction SM36 or choose CCMS ® Jobs ® Definition .
Assign a job name. Decide on a name for the job you are defining and enter it in the Job Name field.
Set the jobu2019s priority, or "Job Class":
High priority: Class A
Medium priority: Class B
Low priority: Class C
In the Target server field, indicate whether to use system load balancing.
For the system to use system load balancing to automatically select the most efficient application server to use at the moment, leave this field empty.
To use a particular application server to run the job, enter a specific target server.
If spool requests generated by this job are to be sent to someone as email, specify the email address. Choose the Spool list recipient button.
Define when the job is to start by choosing Start Condition and completing the appropriate selections. If the job is to repeat, or be periodic, check the box at the bottom of this screen.
Define the jobu2019s steps by choosing Step, then specify the ABAP program, external command, or external program to be used for each step.
Save the fully defined job to submit it to the background processing system.
When you need to modify, reschedule, or otherwise manipulate a job after you've scheduled it the first time, you'll manage jobs from the Job Overview.
pls give points if it is usefull
Regards
Saimedha

Scheduling type Backwards vs Backwards in time in OPU3

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